code: public final void expressionList() throws RecognitionException {
  		int expressionList_StartIndex = input.index();
  
  		try {
  			if ( state.backtracking>0 && alreadyParsedRule(input, 105) ) { return; }
  
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1107:5: ( expression ( ',' expression )* )
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1107:9: expression ( ',' expression )*
  			{
  			pushFollow(FOLLOW_expression_in_expressionList4817);
  			expression();
  			state._fsp--;
  			if (state.failed) return;
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1107:20: ( ',' expression )*
  			loop139:
  			while (true) {
  				int alt139=2;
  				int LA139_0 = input.LA(1);
  				if ( (LA139_0==43) ) {
  					alt139=1;
  				}
  
  				switch (alt139) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1107:21: ',' expression
  					{
  					match(input,43,FOLLOW_43_in_expressionList4820); if (state.failed) return;
  					pushFollow(FOLLOW_expression_in_expressionList4822);
  					expression();
  					state._fsp--;
  					if (state.failed) return;
  					}
  					break;
  
  				default :
  					break loop139;
  				}
  			}
  
  			}
  
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  		}
  		finally {
  			// do for sure before leaving
  			if ( state.backtracking>0 ) { memoize(input, 105, expressionList_StartIndex); }
  
  		}
  	}
docs: src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1106:1: expressionList : expression ( ',' expression )* ;