nl_tokens: Checks if value is a plain object that is an object created by the Object constructor or one with a [[ Prototype ]] of null .
pl_tokens: function isPlainObject ( value ) { if ( ! isObjectLike_1 ( value ) || _baseGetTag ( value ) != objectTag ) { return false ; } var proto = _getPrototype ( value ) ; if ( proto === null ) { return <mask> ; } var Ctor = hasOwnProperty$1 . call ( proto , 'constructor' ) && proto . constructor ; return typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString . call ( Ctor ) == objectCtorString ; }