nl_tokens: Class to implement inner working of plugin .
pl_tokens: function ( options ) { "use strict" ; if ( ( <mask> . setter && options . setter . indexOf ( '.' ) > - 1 ) || ( options . getter && options . getter . indexOf ( '.' ) > - 1 ) ) { throw new Error ( 'Getter (' + options . getter + ') and setter (' + options . setter + ') methods cannot be nested, so they cannot contain dot(.)' ) ; } this . options = Joi . attempt ( options , optionsSchema ) ; this . locales = this . getAvailableLocales ( ) ; this . default = this . options . default || this . locales [ 0 ] ; //this.callback   = this.getCallback(this.options.callback); }