Find a method by name using regular expression.
        This method will return all MethodClassAnalysis objects, which match the
        classname, methodname, descriptor and accessflags of the method.

        :param classname: regular expression for the classname
        :param methodname: regular expression for the method name
        :param descriptor: regular expression for the descriptor
        :param accessflags: regular expression for the accessflags
        :param no_external: Remove external method from the output (default False)
        :rtype: generator of `MethodClassAnalysis`

def find_methods(self, classname=".*", methodname=".*", descriptor=".*",
            accessflags=".*", no_external=False):
        """
        Find a method by name using regular expression.
        This method will return all MethodClassAnalysis objects, which match the
        classname, methodname, descriptor and accessflags of the method.

        :param classname: regular expression for the classname
        :param methodname: regular expression for the method name
        :param descriptor: regular expression for the descriptor
        :param accessflags: regular expression for the accessflags
        :param no_external: Remove external method from the output (default False)
        :rtype: generator of `MethodClassAnalysis`
        """
        for cname, c in self.classes.items():
            if re.match(classname, cname):
                for m in c.get_methods():
                    z = m.get_method()
                    # TODO is it even possible that an internal class has
                    # external methods? Maybe we should check for ExternalClass
                    # instead...
                    if no_external and isinstance(z, ExternalMethod):
                        continue
                    if re.match(methodname, z.get_name()) and \
                       re.match(descriptor, z.get_descriptor()) and \
                       re.match(accessflags, z.get_access_flags_string()):
                        yield m