IsNull (MDX)
                                    Returns true-false that indicates whether an expression contains no valid data (Null).
                                    
                                        - Returned Output: Boolean
 
                                        - Library: MDX \ VBA \ Logical
 
                                        - Version: 2018.00.000
 
                                        - Compatibility: Microsoft MDX Engines only
 
                                    
                                    Syntax
                                    
                                        
                                    
                                    
                                    Further Help on Syntax and Examples
                                    
                                        - For more details on using the VBA library in MDX please click here.
 
                                        - For more details on the syntax of the VBA function please click here