code: public EList<Parameter> getParameters() {
  		if (parameters == null) {
  			parameters = new EObjectContainmentEList<Parameter>(Parameter.class, this, XtextPackage.PARSER_RULE__PARAMETERS);
  		}
  		return parameters;
  	}
docs: <!-- begin-user-doc -->
  @since 2.9
  <!-- end-user-doc -->
  @generated