This method counts the number of edge records.
On occasion you may find it useful to retrieve or reference the number of records in a database. Using this method, you can count the number of edge records in a database. By default, it returns the records for the edge base class
E. You can retrieve a count of records in subclasses of
E by passing the class name as an argument.
var count = db.countEdges(<class>)
<class>Defines the class you want to count. Defaults to the base edge class,