how can you get the current grid settings

  NAME
          axlDBGridGet - get grid values
  SYNOPSIS
         axlDBGridGet(
                 nil
         ) ==> lt_grids
 
         axlDBGridGet(
                 t_gridName
         ) ==> og_grid
  FUNCTION
         Returns current grid values. Function has two modes:
          - if gridname is nil returns list of names
          - If given a grid name return its grid characturistics (see below)
 
        Reserved grid name is "non-etch" otherwise grid names follow Allegro
        ETCH subclass names.
 
        Use axlDBDisplayControl to control grid color and visibility.
 
        Grids have the following attributes:
 
     NAME                TYPE    DESCRIPTION
     ----------------------------------------
     objType             string  Name of the object - grids
     readOnly            nil     can modify object
     name                string  Name of grid
     xOrigin             dbrep   X origin of grid
     yOrigin             dbrep   Y origin of grid
     xMajor              dbrep   Major X spacing of grid (read-only)
     yMajor              dbrep   Major Y spacing of grid (read-only)
     xGrids              l_dbrep Spacings X of grid (always a list of dbreps)
     yGrids              l_dbrep Spacings Y of grid (always a list of dbreps)
 
  NEEDS
         t_gridName      --      name of grid or nil to get all grir names
  RETURNS
         lt_gridds       -- list of grids
         og_grid         -- disembodied property list containing grid settings
  SEE ALSO
         axlDBGridGet
  EXAMPLE
         # get and print all grids
         grids = axlDBGridGet(nil)
         foreach(g grids
              grd = axlDBGridGet(g)
              printf("GRID name=%s  values=%L\n", grd->name, grd)
         )


  NAME
         axlDBGridSet  - set the design grid
  SYNOPSIS
         axlDBGridSet(
                 og_grid
         ) ==> t/nil
  FUNCTION
         This modifies the grid settings in the design.
         
         In addition to the grid names (see axlDBGridGet), two symbolic
         grid names are available:
            'all - sets all grid values
            'etch - sets all ETCH grid values
         
         As a convenience when setting a single the xGrids or yGrids attribute,
         you can use a float.
 
         Both xMajor and yMajor values are automatically determined by the sum
         of the spacings in xGrids and yGrids respectively.
  NOTES
         - Non etch grids may not have multiple spacings. We only use the 
           first grid seen.
         - Setting grids is not undo-able (this may change in the future).
         - Etch grids names are the same as ETCH layer names. This may
           change in the future.
         - Origin values must be within drawing extents or 0.
         - If Grid dialog is open it will not be updated if you change the grid 
           settings via this API.
  NEEDS
         og_grid - a grid disembodied property list from axlDBGetGrid
  RETURNS
         t if changed grid, nil if failure
  SEE ALSO
         axlDBGridGet, axlDBDisplayControl
  EXAMPLES
         1) Modify TOP grid settings
             grid = axlDBGridGet("TOP")
             grid = axlDBG
         2) Modify all grids ( note allow xGrids and yGrids to NOT be listed)
             grid = axlDBGridGet("TOP")
             grid->name = 'all
             grid->xGrids = 5.0
             grid->yGrids = 5.0
             axlDBGridSet(grid)
         3) Modify all etch grids 
             grid = axlDBGridGet("TOP")
             grid->name = 'etch
             grid->xGrids = '(5.0 7.0)
             grid->yGrids = '(5.0 6.0)
             axlDBGridSet(grid)

  NAME
          axlDBGridGet - get grid values
  SYNOPSIS
         axlDBGridGet(
                 nil
         ) ==> lt_grids
 
         axlDBGridGet(
                 t_gridName
         ) ==> og_grid
  FUNCTION
         Returns current grid values. Function has two modes:
          - if gridname is nil returns list of names
          - If given a grid name return its grid characturistics (see below)
 
        Reserved grid name is "non-etch" otherwise grid names follow Allegro
        ETCH subclass names.
 
        Use axlDBDisplayControl to control grid color and visibility.
 
        Grids have the following attributes:
 
     NAME                TYPE    DESCRIPTION
     ----------------------------------------
     objType             string  Name of the object - grids
     readOnly            nil     can modify object
     name                string  Name of grid
     xOrigin             dbrep   X origin of grid
     yOrigin             dbrep   Y origin of grid
     xMajor              dbrep   Major X spacing of grid (read-only)
     yMajor              dbrep   Major Y spacing of grid (read-only)
     xGrids              l_dbrep Spacings X of grid (always a list of dbreps)
     yGrids              l_dbrep Spacings Y of grid (always a list of dbreps)
 
  NEEDS
         t_gridName      --      name of grid or nil to get all grir names
  RETURNS
         lt_gridds       -- list of grids
         og_grid         -- disembodied property list containing grid settings
  SEE ALSO
         axlDBGridGet
  EXAMPLE
         # get and print all grids
         grids = axlDBGridGet(nil)
         foreach(g grids
              grd = axlDBGridGet(g)
              printf("GRID name=%s  values=%L\n", grd->name, grd)
         )


  NAME
         axlDBGridSet  - set the design grid
  SYNOPSIS
         axlDBGridSet(
                 og_grid
         ) ==> t/nil
  FUNCTION
         This modifies the grid settings in the design.
         
         In addition to the grid names (see axlDBGridGet), two symbolic
         grid names are available:
            'all - sets all grid values
            'etch - sets all ETCH grid values
         
         As a convenience when setting a single the xGrids or yGrids attribute,
         you can use a float.
 
         Both xMajor and yMajor values are automatically determined by the sum
         of the spacings in xGrids and yGrids respectively.
  NOTES
         - Non etch grids may not have multiple spacings. We only use the 
           first grid seen.
         - Setting grids is not undo-able (this may change in the future).
         - Etch grids names are the same as ETCH layer names. This may
           change in the future.
         - Origin values must be within drawing extents or 0.
         - If Grid dialog is open it will not be updated if you change the grid 
           settings via this API.
  NEEDS
         og_grid - a grid disembodied property list from axlDBGetGrid
  RETURNS
         t if changed grid, nil if failure
  SEE ALSO
         axlDBGridGet, axlDBDisplayControl
  EXAMPLES
         1) Modify TOP grid settings
             grid = axlDBGridGet("TOP")
             grid = axlDBG
         2) Modify all grids ( note allow xGrids and yGrids to NOT be listed)
             grid = axlDBGridGet("TOP")
             grid->name = 'all
             grid->xGrids = 5.0
             grid->yGrids = 5.0
             axlDBGridSet(grid)
         3) Modify all etch grids 
             grid = axlDBGridGet("TOP")
             grid->name = 'etch
             grid->xGrids = '(5.0 7.0)
             grid->yGrids = '(5.0 6.0)
             axlDBGridSet(grid)