docs: public final DSLMapParser.literal_return literal() throws RecognitionException {
  		DSLMapParser.literal_return retval = new DSLMapParser.literal_return();
  		retval.start = input.LT(1);
  
  		Object root_0 = null;
  
  		Token set24=null;
  
  		Object set24_tree=null;
  
  		try {
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:186:5: ( ( LITERAL | COLON | LEFT_SQUARE | RIGHT_SQUARE ) )
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMap.g:
  			{
  			root_0 = (Object)adaptor.nil();
  
  
  			set24=input.LT(1);
  			if ( input.LA(1)==COLON||(input.LA(1) >= LEFT_SQUARE && input.LA(1) <= LITERAL)||input.LA(1)==RIGHT_SQUARE ) {
  				input.consume();
  				if ( state.backtracking==0 ) adaptor.addChild(root_0, (Object)adaptor.create(set24));
  				state.errorRecovery=false;
  				state.failed=false;
  			}
  			else {
  				if (state.backtracking>0) {state.failed=true; return retval;}
  				MismatchedSetException mse = new MismatchedSetException(null,input);
  				throw mse;
  			}
  			}
  
  			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;
  	}