question: public final boolean contentEquals ( java . lang . CharSequence csq ) { if ( csq . length ( ) != _length ) return false ; for ( int i = 0 ; i < _length ; ) { char c = i < C1 ? _low [ i ] : _high [ i > > B1 ] [ i & M1 ] ; if ( csq . charAt ( i ++ ) != c ) return false ; } return true ; }
target:  Indicates if this text builder has the same character content as the  specified character sequence.