docs: public final void identifierSuffix() throws RecognitionException {
  		Token LEFT_SQUARE15=null;
  		Token RIGHT_SQUARE16=null;
  		Token DOT17=null;
  		Token LEFT_SQUARE18=null;
  		Token RIGHT_SQUARE19=null;
  
  		try {
  			// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:634:5: ( ( LEFT_SQUARE RIGHT_SQUARE )=> ( LEFT_SQUARE RIGHT_SQUARE )+ DOT class_key | ( ( LEFT_SQUARE )=> LEFT_SQUARE expression RIGHT_SQUARE )+ | arguments )
  			int alt73=3;
  			int LA73_0 = input.LA(1);
  			if ( (LA73_0==LEFT_SQUARE) ) {
  				int LA73_1 = input.LA(2);
  				if ( (LA73_1==RIGHT_SQUARE) && (synpred38_DRL6Expressions())) {
  					alt73=1;
  				}
  				else if ( (LA73_1==BOOL||(LA73_1 >= DECIMAL && LA73_1 <= DIV)||LA73_1==DOT||LA73_1==FLOAT||LA73_1==HEX||(LA73_1 >= ID && LA73_1 <= INCR)||(LA73_1 >= LEFT_PAREN && LA73_1 <= LESS)||LA73_1==MINUS||LA73_1==NEGATION||LA73_1==NULL||LA73_1==PLUS||LA73_1==QUESTION_DIV||(LA73_1 >= STAR && LA73_1 <= TIME_INTERVAL)) ) {
  					alt73=2;
  				}
  
  				else {
  					if (state.backtracking>0) {state.failed=true; return;}
  					int nvaeMark = input.mark();
  					try {
  						input.consume();
  						NoViableAltException nvae =
  							new NoViableAltException("", 73, 1, input);
  						throw nvae;
  					} finally {
  						input.rewind(nvaeMark);
  					}
  				}
  
  			}
  			else if ( (LA73_0==LEFT_PAREN) ) {
  				alt73=3;
  			}
  
  			else {
  				if (state.backtracking>0) {state.failed=true; return;}
  				NoViableAltException nvae =
  					new NoViableAltException("", 73, 0, input);
  				throw nvae;
  			}
  
  			switch (alt73) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:634:7: ( LEFT_SQUARE RIGHT_SQUARE )=> ( LEFT_SQUARE RIGHT_SQUARE )+ DOT class_key
  					{
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:634:35: ( LEFT_SQUARE RIGHT_SQUARE )+
  					int cnt71=0;
  					loop71:
  					while (true) {
  						int alt71=2;
  						int LA71_0 = input.LA(1);
  						if ( (LA71_0==LEFT_SQUARE) ) {
  							alt71=1;
  						}
  
  						switch (alt71) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:634:36: LEFT_SQUARE RIGHT_SQUARE
  							{
  							LEFT_SQUARE15=(Token)match(input,LEFT_SQUARE,FOLLOW_LEFT_SQUARE_in_identifierSuffix3671); if (state.failed) return;
  							if ( state.backtracking==0 ) { helper.emit(LEFT_SQUARE15, DroolsEditorType.SYMBOL); }
  							RIGHT_SQUARE16=(Token)match(input,RIGHT_SQUARE,FOLLOW_RIGHT_SQUARE_in_identifierSuffix3712); if (state.failed) return;
  							if ( state.backtracking==0 ) { helper.emit(RIGHT_SQUARE16, DroolsEditorType.SYMBOL); }
  							}
  							break;
  
  						default :
  							if ( cnt71 >= 1 ) break loop71;
  							if (state.backtracking>0) {state.failed=true; return;}
  							EarlyExitException eee = new EarlyExitException(71, input);
  							throw eee;
  						}
  						cnt71++;
  					}
  
  					DOT17=(Token)match(input,DOT,FOLLOW_DOT_in_identifierSuffix3756); if (state.failed) return;
  					if ( state.backtracking==0 ) { helper.emit(DOT17, DroolsEditorType.SYMBOL); }
  					pushFollow(FOLLOW_class_key_in_identifierSuffix3760);
  					class_key();
  					state._fsp--;
  					if (state.failed) return;
  					}
  					break;
  				case 2 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:637:7: ( ( LEFT_SQUARE )=> LEFT_SQUARE expression RIGHT_SQUARE )+
  					{
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:637:7: ( ( LEFT_SQUARE )=> LEFT_SQUARE expression RIGHT_SQUARE )+
  					int cnt72=0;
  					loop72:
  					while (true) {
  						int alt72=2;
  						int LA72_0 = input.LA(1);
  						if ( (LA72_0==LEFT_SQUARE) ) {
  							int LA72_36 = input.LA(2);
  							if ( (synpred39_DRL6Expressions()) ) {
  								alt72=1;
  							}
  
  						}
  
  						switch (alt72) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:637:8: ( LEFT_SQUARE )=> LEFT_SQUARE expression RIGHT_SQUARE
  							{
  							LEFT_SQUARE18=(Token)match(input,LEFT_SQUARE,FOLLOW_LEFT_SQUARE_in_identifierSuffix3775); if (state.failed) return;
  							if ( state.backtracking==0 ) { helper.emit(LEFT_SQUARE18, DroolsEditorType.SYMBOL); }
  							pushFollow(FOLLOW_expression_in_identifierSuffix3805);
  							expression();
  							state._fsp--;
  							if (state.failed) return;
  							RIGHT_SQUARE19=(Token)match(input,RIGHT_SQUARE,FOLLOW_RIGHT_SQUARE_in_identifierSuffix3833); if (state.failed) return;
  							if ( state.backtracking==0 ) { helper.emit(RIGHT_SQUARE19, DroolsEditorType.SYMBOL); }
  							}
  							break;
  
  						default :
  							if ( cnt72 >= 1 ) break loop72;
  							if (state.backtracking>0) {state.failed=true; return;}
  							EarlyExitException eee = new EarlyExitException(72, input);
  							throw eee;
  						}
  						cnt72++;
  					}
  
  					}
  					break;
  				case 3 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:640:9: arguments
  					{
  					pushFollow(FOLLOW_arguments_in_identifierSuffix3849);
  					arguments();
  					state._fsp--;
  					if (state.failed) return;
  					}
  					break;
  
  			}
  		}
  
  		catch (RecognitionException re) {
  		    throw re;
  		}
  
  		finally {
  			// do for sure before leaving
  		}
  	}