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Replace symbol pin names without changing the pin placement and symbol boundary

SimhanAnalog

Say I have a symbol with a few pins 

o_h<2:0>

o_m

o_a<1:0>
o_b<3:0>

i_c<1:0>

i_d<2:0>

i_f<5:0>

i_g

i_s<3:0>

Say I want to rename the pins as follows retaining the same bit widths

o_b -> o_y

o_a -> o_x

i_d -> i_z

I want to ensure that the symbol dimensions and pin placements remain same so that the schematic where this symbol is instantiated and connections are made is intact.

I will like to provide this pin changes in a text file like below

o_b, o_y

o_a, o_x

i_d, i_z

Is there a simple way to do this. Or does cadence already has some api that can do this.

Thanks

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