title: Matlab oop, non-static functions: Input-argument tooltip issues
body: <p>Consider the following class definition:</p>
  
  <pre><code>classdef myClass
      properties
          propX
      end    
      methods (Static = false)
          function self = myFunNonStatic(self,arg1,arg2)
              self.propX = doSomething(arg1,arg2);
          end
      end
      methods (Static = true)
          function x = myFunStatic(arg1,arg2)
              x = doSomething(arg1,arg2);            
          end
      end
  end
  </code></pre>
  
  <p>Like any standalone function, there will be a helpful tooltip that refers to the input arguments when the static-function call is typed:</p>
  
  <p><a href="https://i.stack.imgur.com/LWrV4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LWrV4.png" alt="Static-function call"></a></p>
  
  <p>However, the non-static-function call will only provide a useless tooltip that refers to the obvious first argument and nothing else:</p>
  
  <p><a href="https://i.stack.imgur.com/Nn3Ue.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Nn3Ue.png" alt="Non-static-function call"></a></p>
  
  <p>I would want to to have the tooltip say <code>myFunNonStatic(arg1,arg2)</code> or <code>myFunNonStatic(myClass object,arg1,arg2)</code>. I do a lot of oop in Matlab lately and this is bugging me a lot because I always need to open the function's code-block to look up the input arguments of non-static functions.</p>
  
  <p>Also, the tooltip for the call of a static function from a class instance fails to give any information:</p>
  
  <p><a href="https://i.stack.imgur.com/gG6as.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gG6as.png" alt="Static-function call from class instance"></a></p>
  
  <p>Does anyone know how these issues can be dealt with?
  I read about the <code>functionSignatures.json</code> definitions <a href="https://de.mathworks.com/matlabcentral/answers/306157-how-to-configure-tab-completion-for-my-function-in-matlab-2016#answer_237857" rel="nofollow noreferrer">here</a>, but this seems to work only with standalone functions but not classes and their functions. Or am I missing something?</p>