code: function run(server, query) {
  			if(server.options && typeof server.options.plugins === 'object') {
  				var plugins = server.options.plugins;
  				var keys = Object.keys(plugins);
  				var envs = Object.create(null);
  				for(var i = 0; i < keys.length; i++) {
  					var key = keys[i];
  					var env = plugins[key].env;
  					if(env) {
  						envs[env] = true;
  					} else {
  						envs[plugins[key]] = true;
  					}
  				}
  				return envs;
  			}
  			return null;
  		}
docs: $NON-NLS-1$ 
  @callback