nl_tokens: Promisify the given name on the given object and create a copy of the object .
pl_tokens: function promisifyMethod ( obj , methodName , <mask> ) { if ( ! obj ) { // This object could be anything, including a function, a real object, or an array. throw new TypeError ( 'promisify.method requires a truthy value' ) ; } return promisify ( obj [ methodName ] . bind ( obj ) , options ) ; }