 Returns the "dirty" state for this set of macros.
	 * If the dirty state is <code>true</code>, that means that the macros
	 * is out of synch with the repository and the macros need to be serialized.
	 * <br><br>
	 * The dirty state is automatically set to <code>false</code> when the macros are serialized
	 * by calling the serialize() method
 Returns the "dirty" state for this set of macros.
	 * If the dirty state is <code>true</code>, that means that the macros
	 * is out of synch with the repository and the macros need to be serialized.
	 * <br><br>
	 * The dirty state is automatically set to <code>false</code> when the macros are serialized
	 * by calling the serialize() method | StorableCdtVariables.java