
admin.appserverExists( config as element(configuration), group-ids as (Number|String)[], appserver-name as String ) as Boolean
This function determines whether or not the specified
	App Server (HTTP, XDBC, or ODBC)
  exists.  Returns true if the App Server exists, otherwise
  false is returned.
  
  
  const admin = require('/MarkLogic/admin.xqy');
  const config = admin.getConfiguration()
  const groups = admin.getGroupIds(config)
  admin.appserverExists(config, groups, "Admin")
   //Returns true, if the Admin App Server exists.