public DataTypeManager[] getDataTypeManagers() {
		DataTypeManager[] managers = new DataTypeManager[openArchives.size()];
		for (int i = 0; i < managers.length; i++) {
			managers[i] = openArchives.get(i).getDataTypeManager();
		}
		return managers;
	}
Determine if we can remember the specified project archive using a simple project path
(e.g., we can't remember specific versions).
@param pa project archive
@param activeProjectOnly if true pa must be contained within the
active project to be remembered.
@return return project path which can be remembered or null
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/archive/DataTypeManagerHandler.java