code: function setProfilingLevel(db, level, options, callback) {
    const command = {};
    let profile = 0;
  
    if (level === 'off') {
      profile = 0;
    } else if (level === 'slow_only') {
      profile = 1;
    } else if (level === 'all') {
      profile = 2;
    } else {
      return callback(new Error('Error: illegal profiling level value ' + level));
    }
  
    // Set up the profile number
    command['profile'] = profile;
  
    executeCommand(db, command, options, (err, doc) => {
      if (err == null && doc.ok === 1) return callback(null, level);
      return err != null
        ? callback(err, null)
        : callback(new Error('Error with profile command'), null);
    });
  }
docs: Set the current profiling level of MongoDB
  
  @method
  @param {Db} db The Db instance on which to execute the command.
  @param {string} level The new profiling level (off, slow_only, all).
  @param {Object} [options] Optional settings. See Db.prototype.setProfilingLevel for a list of options.
  @param {Db~resultCallback} [callback] The command result callback.