Hide Marketing attributes dynamically : BP_DATA MarketingAttributesEOVP

Hello Friends,

I am stuck on one requirement where I need to delete some marketing attributes value at runtime for particular attribute set.

I have redefine the method GET_V_VALUE_DESCR of class CL_BP_DATA_MARKETINGATTR4_CN01.

Now I need to delete some entries from attributes gt_selection_table and gt_values of class gv_value_descr_valuehelp.

Both attributes are private in class.  refer below screen.

How do I access private variable and delete some entries before sending data back to UI,

Thanks

Nikhil