subfunctionNames = Modulename('DescrlbeModuleFunctionsHelper' [, mode] [, subfunctionName]);
Return a cell array of strings naming all subfunctions supported by this module
if the optional 'subfunctionName' argument is omitted. If 'subfunctionName' is a
string with a valid subfunction name for the module, and 'mode' is 1, return a 3
element cell array of strings which describe the detailed syntax, help and see
also strings for that function - the text you'd get for
Modulename('subfunctionName?');