This method is called when the document has been informed
by an internal process that the document has been updated
calling the update( XElement element) method.
Returns the manager that allows the service to interact with
other services and allows the service to get a programmatic
handle to documents and elements that are already 'internal'
to the browser application.
Sets the manager that allows the service to interact with
other services and allows the service to get a programmatic
handle to documents and elements that are already 'internal'
to the browser application.