FNDFFMSV form: Move child range

Problem Description: Would like to know which API is called when user clicks the "Move" button for moving the child range from one parent hierarchy to another. When the child range is moved, the data from the table fnd_flex_value_norm_hierarchy gets delete for the source parent flex value. I want to know where exactly does this take place in the form, so that I can replicated this from back end.

Hello Gurus,

I am trying to replicate the Move child flex values from one parent hierarchy to another parent hierarchy using Oracle standard APIs. From Oracle apps, the process is loginto Sys Admin responsibility --> Application --> Validation -->Values,