@Override
	protected boolean canCloseDomainObject(DomainObject dObj) {
		if (dObj instanceof DataTypeManagerDomainObject) {
			DataTypeManagerDomainObject dtmObject = (DataTypeManagerDomainObject) dObj;
			return editorManager.checkEditors(dtmObject.getDataTypeManager(), true);
		}
		return true;
	}
A collection of files that have recently been opened by the user.
@return A collection of files that have recently been opened by the user.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/DataTypeManagerPlugin.java