vr_ad_file multiple instance

Hello All, I have a situation where i want to implement 8 instance of some particular reg_file which all have many reg_def and reg_fld. For example : I have 8 instance of one DUT module (TEST0, TEST1,TEST2... TEST8), since its all are the instance so all the instance will have the sets of registers.. so to implement reg for one instance i can write code like.. extend vr_ad_reg_file_kind : [TEST0]; extend TEST0 vr_ad_reg_file { keep size == 256; }; reg_def EX_REG_TX_DATA TEST0 8’h00 { // name : type : mask : reset value reg_fld data : uint(bits:8) : RW : 0; }; But now the issue is inside 1 instance i have around 256 registers, and i need to implement for all the 8 instance.... so can anyone suggest me how we can make instance for vr_ad_reg_file, otherwise i have to write same code for all the 8 instance. Thanks