docs: public final void key_sentence() throws RecognitionException {
  		CommonTree vtl=null;
  
  		try {
  			// src/main/resources/org/drools/compiler/lang/dsl/DSLMapWalker.g:88:5: ( variable_definition |vtl= VT_LITERAL | VT_SPACE )
  			int alt10=3;
  			switch ( input.LA(1) ) {
  			case VT_VAR_DEF:
  				{
  				alt10=1;
  				}
  				break;
  			case VT_LITERAL:
  				{
  				alt10=2;
  				}
  				break;
  			case VT_SPACE:
  				{
  				alt10=3;
  				}
  				break;
  			default:
  				NoViableAltException nvae =
  					new NoViableAltException("", 10, 0, input);
  				throw nvae;
  			}
  			switch (alt10) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/lang/dsl/DSLMapWalker.g:88:7: variable_definition
  					{
  					pushFollow(FOLLOW_variable_definition_in_key_sentence277);
  					variable_definition();
  					state._fsp--;
  
  					}
  					break;
  				case 2 :
  					// src/main/resources/org/drools/compiler/lang/dsl/DSLMapWalker.g:89:7: vtl= VT_LITERAL
  					{
  					vtl=(CommonTree)match(input,VT_LITERAL,FOLLOW_VT_LITERAL_in_key_sentence287); 
  
  					        entry_stack.peek().keybuffer.append((vtl!=null?vtl.getText():null));
  					        entry_stack.peek().sentenceKeyBuffer.append((vtl!=null?vtl.getText():null));
  					    
  					}
  					break;
  				case 3 :
  					// src/main/resources/org/drools/compiler/lang/dsl/DSLMapWalker.g:94:7: VT_SPACE
  					{
  					match(input,VT_SPACE,FOLLOW_VT_SPACE_in_key_sentence301); 
  
  					        entry_stack.peek().keybuffer.append("\\s+");
  					        entry_stack.peek().sentenceKeyBuffer.append(" ");
  					    
  					}
  					break;
  
  			}
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  		}
  		finally {
  			// do for sure before leaving
  		}
  	}