VARNAME object index
Works much like STRING, but the returned string is not the value of the members, but the member's name. Before the string is returned, the attributes of the variable are returned on their own line, in brackets. If the variable has no attributes set, the brackets will be empty. Otherwise, they will be a comma-separated list of the attributes. The possibilities are: DontEnum, DontDelete, ReadOnly, ImplicitThis, ImplicitParents.