MSIR.0758 Class (class), (method) returns no value so can only be used in standalone call

A method was included as part or all of a User Language expression, but that method does not return a value. Such a method can only be implicitly or explicitly Called outside of any expression context. If the object is a member of a system class, check the method documentation to determine its intent. If the object is a member of a User Language class, either correct the method declaration and definition or the statement flagged by this error.