@Override
	protected void programActivated(Program program) {

		program.addListener(this);
	}
Overridden in order to add ourselves as a {@link DomainObjectListener}
to the current program.

@param program The activated program.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/disassembler/DisassembledViewPlugin.java