This class provides an empty implementation of OrbitListener, which can be extended to create a listener which only needs to handle a subset of the available methods.

This class provides an empty implementation of OrbitVisitor, which can be extended to create a visitor which only needs to handle a subset of the available methods.

This interface defines a complete listener for a parse tree produced by OrbitParser.

This interface defines a complete generic visitor for a parse tree produced by OrbitParser.