get the index of the parent gain . frameworks use only . concode_field_sep int mValues[] concode_elem_sep int mChannelMask concode_elem_sep int mMode concode_elem_sep AudioGain mGain concode_elem_sep int mIndex concode_elem_sep int mRampDurationMs concode_field_sep int mode concode_elem_sep int[] values concode_elem_sep int channelMask concode_elem_sep int rampDurationMs
int function ( ) { return mIndex ; }