Return linked context as adapter specification (is used by :class:`.WCommandContextAdapter`)

		:param context_specs: context names
		:return: WContext

def specification(cls, *context_specs):
		""" Return linked context as adapter specification (is used by :class:`.WCommandContextAdapter`)

		:param context_specs: context names
		:return: WContext
		"""
		import_data = []
		for name in context_specs:
			import_data.append((name, None))
		return cls.import_context(import_data)