question: public void fromArray ( int [ ] members ) { if ( this . members . length != members . length ) { throw new IllegalArgumentException ( "invalid subset length" ) ; } memberSet . clear ( ) ; for ( int i = 0 ; i < members . length ; i ++ ) { this . members [ i ] = members [ i ] ; memberSet . add ( members [ i ] ) ; } validate ( ) ; }
target:  Populates this subset from an array.