import { LeftRightBasedExpression } from '../LeftRightBasedExpression' ; import { OclExecutionContext } from '../../OclExecutionContext' ; oclExpression oclExample export class AdditionExpression extends LeftRightBasedExpression { evaluate ( visitor , localVariables ? ) { const { left , right } = this . _evaluateLeftRightExpression ( visitor , localVariables ) ; return left + right ; } }