private void decrementInUseCount() {
		synchronized (this) {
			if (inUseCount <= 0) {
				Msg.error(this, "DefaultProjectData in-use tracking is out-of-sync: " + projectDir);
			}
			if (--inUseCount > 0 || !closed) {
				return;
			}
		}
		dispose();
	}
Reconcile user data files against all content files within the project.
This must only be done while connected to the repository
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/DefaultProjectData.java