nl_tokens: Performs Ajax request .
pl_tokens: function ( operation , callback , scope ) { var me = this , writer = me . getWriter ( ) , request = me . buildRequest ( operation ) ; request . setConfig ( { headers : me . getHeaders ( ) , timeout : me . getTimeout ( ) , method : me . getMethod ( <mask> ) , callback : me . createRequestCallback ( request , operation , callback , scope ) , scope : me , proxy : me , useDefaultXhrHeader : me . getUseDefaultXhrHeader ( ) } ) ; if ( operation . getWithCredentials ( ) || me . getWithCredentials ( ) ) { request . setWithCredentials ( true ) ; request . setUsername ( me . getUsername ( ) ) ; request . setPassword ( me . getPassword ( ) ) ; } // We now always have the writer prepare the request request = writer . write ( request ) ; Ext . Ajax . request ( request . getCurrentConfig ( ) ) ; return request ; }