Read metadata of a Class and function with their arguments information

Hi

I want to read a function's arguments and their type information.

By acquiring Metadata object, i can get the available public methods of a class in SAPUI5. But the metadata object does not tell me what arguments are accepted for the respective methods.

For example, i got an object of a sap.m.Button. Using button's getMetadata().getPublicMethods(), i get the list of available methods. The result will be something like this: getText, getWidth, getEnabled, getType, setType, setText, setWidth and so on.

I want to invoke setType method. But this Metadata object does not tell me what are the accepted arguments for this method.

How can I hold of this information either from framework, jquery or java script?

For example, in Web IDE, we display all these information in Layout Editor.

Thanks