Overrides original :meth:`.WCapabilitiesHolder.capability` method to support
		:class:`.WNetworkClientCapabilities` as a capability value

def capability(self, cap_name):
		""" Overrides original :meth:`.WCapabilitiesHolder.capability` method to support
		:class:`.WNetworkClientCapabilities` as a capability value
		"""
		if isinstance(cap_name, WNetworkClientCapabilities) is True:
			cap_name = cap_name.value
		return WCapabilitiesHolder.capability(self, cap_name)