lib/proto.js
function ExistsError(name, message) {
  Error.call(this);
  Error.captureStackTrace(this, arguments.callee);
  this.name = 'Middleware Exists Error';
  this.message = message || 'Middleware named ' + name + ' already exists. Provide an alternative name.';
}
function ExistsError(name, message) {
  Error.call(this);
  Error.captureStackTrace(this, arguments.callee);
  this.name = 'Middleware Exists Error';
  this.message = message || 'Middleware named ' + name + ' already exists. Provide an alternative name.';
}
function ExistsError ( name , message ) { Error . call ( this ) ; Error . captureStackTrace ( this , arguments . callee ) ; this . name = 'Middleware Exists Error' ; this . message = message || 'Middleware named ' + name + ' already exists. Provide an alternative name.' ; }
Define an error for middleware already in the stack
Define an error for middleware already in the stack