docs: public final JavaParser.parExpression_return parExpression() throws RecognitionException {
  		JavaParser.parExpression_return retval = new JavaParser.parExpression_return();
  		retval.start = input.LT(1);
  		int parExpression_StartIndex = input.index();
  
  		try {
  			if ( state.backtracking>0 && alreadyParsedRule(input, 104) ) { return retval; }
  
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1103:5: ( '(' expression ')' )
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1103:7: '(' expression ')'
  			{
  			match(input,36,FOLLOW_36_in_parExpression4794); if (state.failed) return retval;
  			pushFollow(FOLLOW_expression_in_parExpression4796);
  			expression();
  			state._fsp--;
  			if (state.failed) return retval;
  			match(input,37,FOLLOW_37_in_parExpression4798); if (state.failed) return retval;
  			}
  
  			retval.stop = input.LT(-1);
  
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  		}
  		finally {
  			// do for sure before leaving
  			if ( state.backtracking>0 ) { memoize(input, 104, parExpression_StartIndex); }
  
  		}
  		return retval;
  	}