code: def find_server_defs(self, basename):
          
          filters = ['name==%s' % basename]
          fuzzy = self.deployment.servers.index(params={'filter[]': filters})
          matches = []
          for f in fuzzy:
              if basename != f.soul['name']:
                  continue
              if 'current_instance' not in f.links:
                  matches.append(f.href)
          if matches:
              self.basename = basename
          return matches
docs: Finds *usable* server definitions by name.
  
          A server definition is *usable* if it doesn't have a current instance.
  
          NOTE: This might result in extra server definitions if some servers are
          in various non-operational states (e.g. terminating).