docs: public final void mDecimalLiteral() throws RecognitionException {
  		try {
  			int _type = DecimalLiteral;
  			int _channel = DEFAULT_TOKEN_CHANNEL;
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:16: ( ( '0' | NonZeroDigit ( ( Digits )? | Underscores Digits ) ) ( IntegerTypeSuffix )? )
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:18: ( '0' | NonZeroDigit ( ( Digits )? | Underscores Digits ) ) ( IntegerTypeSuffix )?
  			{
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:18: ( '0' | NonZeroDigit ( ( Digits )? | Underscores Digits ) )
  			int alt5=2;
  			int LA5_0 = input.LA(1);
  			if ( (LA5_0=='0') ) {
  				alt5=1;
  			}
  			else if ( ((LA5_0 >= '1' && LA5_0 <= '9')) ) {
  				alt5=2;
  			}
  
  			else {
  				NoViableAltException nvae =
  					new NoViableAltException("", 5, 0, input);
  				throw nvae;
  			}
  
  			switch (alt5) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:19: '0'
  					{
  					match('0'); 
  					}
  					break;
  				case 2 :
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:25: NonZeroDigit ( ( Digits )? | Underscores Digits )
  					{
  					mNonZeroDigit(); 
  
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:38: ( ( Digits )? | Underscores Digits )
  					int alt4=2;
  					int LA4_0 = input.LA(1);
  					if ( (LA4_0=='_') ) {
  						alt4=2;
  					}
  
  					else {
  						alt4=1;
  					}
  
  					switch (alt4) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:39: ( Digits )?
  							{
  							// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:39: ( Digits )?
  							int alt3=2;
  							int LA3_0 = input.LA(1);
  							if ( ((LA3_0 >= '0' && LA3_0 <= '9')) ) {
  								alt3=1;
  							}
  							switch (alt3) {
  								case 1 :
  									// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:39: Digits
  									{
  									mDigits(); 
  
  									}
  									break;
  
  							}
  
  							}
  							break;
  						case 2 :
  							// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:49: Underscores Digits
  							{
  							mUnderscores(); 
  
  							mDigits(); 
  
  							}
  							break;
  
  					}
  
  					}
  					break;
  
  			}
  
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1304:70: ( IntegerTypeSuffix )?
  			int alt6=2;
  			int LA6_0 = input.LA(1);
  			if ( (LA6_0=='L'||LA6_0=='l') ) {
  				alt6=1;
  			}
  			switch (alt6) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:
  					{
  					if ( input.LA(1)=='L'||input.LA(1)=='l' ) {
  						input.consume();
  					}
  					else {
  						MismatchedSetException mse = new MismatchedSetException(null,input);
  						recover(mse);
  						throw mse;
  					}
  					}
  					break;
  
  			}
  
  			}
  
  			state.type = _type;
  			state.channel = _channel;
  		}
  		finally {
  			// do for sure before leaving
  		}
  	}