code: def get_interface(self, fullname):
          
          result = None
          [modname, iname] = fullname.split(".")
          module = self.get(modname)
          if module is not None:
              if iname in module.interfaces:
                  result = module.interfaces[iname]
          return result
docs: Gets the interface corresponding to the specified full name.
  
          :arg fullname: a string with modulename.interface.