Determine if a C++ member function or member function template is declared 'const'.
Given a cursor pointing to a C++ method call or an Objective-C message, returns non-zero if the method/message is "dynamic", meaning:
Determine if a C++ member function or member function template is pure virtual.
Determine if a C++ member function or member function template is explicitly declared 'virtual' or if it overrides a virtual method from one of the base classes.
Return: Retrieve the Type of the result for this Cursor.