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$1 ( value ) { if ( ! isObjectLike$2 ( value ) || objectToString$2 . call ( value ) != objectTag$2 ) { return false ; } var proto = getPrototype$1 ( value ) ; if ( proto === null ) { return true ; } var Ctor = hasOwnProperty$2 . <mask> ( proto , 'constructor' ) && proto . constructor ; return ( typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString$2 . call ( Ctor ) == objectCtorString$1 ) ; }