code: func (db *Database) Run(cmd interface{}, result interface{}) error {
  	socket, err := db.Session.acquireSocket(true)
  	if err != nil {
  		return err
  	}
  	defer socket.Release()
  
  	// This is an optimized form of db.C("$cmd").Find(cmd).One(result).
  	return db.run(socket, cmd, result)
  }
docs: // Run issues the provided command on the db database and unmarshals
  // its result in the respective argument. The cmd argument may be either
  // a string with the command name itself, in which case an empty document of
  // the form bson.M{cmd: 1} will be used, or it may be a full command document.
  //
  // Note that MongoDB considers the first marshalled key as the command
  // name, so when providing a command with options, it's important to
  // use an ordering-preserving document, such as a struct value or an
  // instance of bson.D.  For instance:
  //
  //     db.Run(bson.D{{"create", "mycollection"}, {"size", 1024}})
  //
  // For privilleged commands typically run on the "admin" database, see
  // the Run method in the Session type.
  //
  // Relevant documentation:
  //
  //     http://www.mongodb.org/display/DOCS/Commands
  //     http://www.mongodb.org/display/DOCS/List+of+Database+CommandSkips
  //