import { BodyBasedExpression } from '../Expression' ; import { OclExecutionContext } from '../../OclExecutionContext' ; oclExpression oclExample export class ConcatExpression extends BodyBasedExpression { evaluate ( visitor , localVariables ? ) { const source = this . getSource ( ) . evaluate ( visitor , localVariables ) ; const body = this . getBody ( ) . evaluate ( visitor , localVariables ) ; return String ( source ) . concat ( String ( body ) ) ; } }