COBCH1821 An extension method must have at least one parameter

Resolution:

Add at least one parameter to the extension method, which is required because it is treated as a pseudo-instance variable when the method is called.

Example:

In the following example, The M2 extension method has no parameter but is invoked such that a parameter is required.

       class-id a static.
       method-id M1 extension.
       end method.
       method-id M2 extension (s as string)
       end method.
       method-id main static.
           declare s as string
           invoke s::M2        *> First parameter of M2 treated as pseudo-instance variable
       end method.
       end class.