The Connector Interface object is obtained either by loading a Connector Interface explicitly (system.loadConnector) or by retrieving the named AssemblyLine Connectors's .connector (myConnector.connector). When writing scripts in an AssemblyLine, you usually use the AssemblyLine Connector object that gives you access to another set of methods.
The Connector Interface is fully described as Connector in the Javadocs. For more information, see the Javadocs material included in the installation package (com.ibm.di.connector.Connector).
Some of the often-used methods include: