nargout_class

nargout doesn't work for methods. Although some workaround was proposed(https://kr.mathworks.com/matlabcentral/answers/96617-how-can-i-use-nargin-nargout-to-determine-the-number-of-input-output-arguments-of-an-object-method), it does not work for inherited methods. This function extends nargout function to methods and inherited methods.

function nargout_class(C,M)

% input
% C : name of the class (char) or Object

% M : name of the method (char) or method handle (function_handle)

% output
% n : number of output argument of method M (double)