docs: public final DSLMapParser.variable_reference_expr_return variable_reference_expr() throws RecognitionException {
  		DSLMapParser.variable_reference_expr_return retval = new DSLMapParser.variable_reference_expr_return();
  		retval.start = input.LT(1);
  
  		Object root_0 = null;
  
  		Token set36=null;
  
  		Object set36_tree=null;
  
  		try {
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:248:5: ( ( LITERAL | EQUALS )+ )
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:248:8: ( LITERAL | EQUALS )+
  			{
  			root_0 = (Object)adaptor.nil();
  
  
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:248:8: ( LITERAL | EQUALS )+
  			int cnt17=0;
  			loop17:
  			while (true) {
  				int alt17=2;
  				int LA17_0 = input.LA(1);
  				if ( (LA17_0==EQUALS||LA17_0==LITERAL) ) {
  					alt17=1;
  				}
  
  				switch (alt17) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:
  					{
  					set36=input.LT(1);
  					if ( input.LA(1)==EQUALS||input.LA(1)==LITERAL ) {
  						input.consume();
  						if ( state.backtracking==0 ) adaptor.addChild(root_0, (Object)adaptor.create(set36));
  						state.errorRecovery=false;
  						state.failed=false;
  					}
  					else {
  						if (state.backtracking>0) {state.failed=true; return retval;}
  						MismatchedSetException mse = new MismatchedSetException(null,input);
  						throw mse;
  					}
  					}
  					break;
  
  				default :
  					if ( cnt17 >= 1 ) break loop17;
  					if (state.backtracking>0) {state.failed=true; return retval;}
  					EarlyExitException eee = new EarlyExitException(17, input);
  					throw eee;
  				}
  				cnt17++;
  			}
  
  			}
  
  			retval.stop = input.LT(-1);
  
  			if ( state.backtracking==0 ) {
  			retval.tree = (Object)adaptor.rulePostProcessing(root_0);
  			adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);
  			}
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  			retval.tree = (Object)adaptor.errorNode(input, retval.start, input.LT(-1), re);
  		}
  		finally {
  			// do for sure before leaving
  		}
  		return retval;
  	}