nl_tokens: / --- API
pl_tokens: function RpcError ( <mask> , msg ) { var off = 0 ; if ( cause instanceof Error ) off = 1 ; var args = Array . prototype . slice . call ( arguments , off ) ; args . unshift ( { cause : off ? cause : undefined , ctor : RpcError } ) ; WError . apply ( this , args ) ; this . type = 1 ; // reply }