private static void domainObjectClosed(DomainObject dobj) {

		DefaultProjectData projectData = fileTrackingMap.remove(dobj);
		if (projectData != null) {
			projectData.decrementInUseCount();
		}
	}
Signals that a <b>non-link</b> file has been opened as the specified 
{@link DomainObjectAdapter doa} from this project data store and should be
tracked.  This will delay disposal of this object until the specified domain object is
either closed or saved to a different project store (i.e., hand-off operation).
It is important that this method not be invoked when opening a link-file
since it is the referenced file being opened that must be tracked and not the 
opening of the link-file itself.
@param doa domain object
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/DefaultProjectData.java