question: public String prepOperand ( String label , DataType dt , ValueType vt ) { StringBuilder sb = new StringBuilder ( ) ; sb . append ( label ) ; sb . append ( Lop . DATATYPE_PREFIX ) ; sb . append ( dt ) ; sb . append ( Lop . VALUETYPE_PREFIX ) ; sb . append ( vt ) ; return sb . toString ( ) ; }
target:  Method to prepare instruction operand with given parameters.