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 ( <mask> ) { if ( ! isObjectLike$1 ( value ) || objectToString$1 . call ( value ) != objectTag || isHostObject$1 ( value ) ) { return false ; } var proto = getPrototype ( value ) ; if ( proto === null ) { return true ; } var Ctor = hasOwnProperty$1 . call ( proto , 'constructor' ) && proto . constructor ; return ( typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString$1 . call ( Ctor ) == objectCtorString ) ; }