private String getSourceArchiveName(DataType dt) {
		SourceArchive sourceArchive = dt.getSourceArchive();
		UniversalID sourceID = (sourceArchive != null) ? sourceArchive.getSourceArchiveID() : null;
		if (sourceID == null) {
			return "Local";
		}
		return sourceArchive.getName();
	}
Panel to show the contents of a Data Type.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/datatypes/DataTypePanel.java