private Entry createEntry(DataType dt) {
		if (dt.getDataTypeManager() != dtManager) {
			dt = dt.clone(dtManager);
		}
		Entry result = new Entry();
		result.dataType = dt;
		result.id = dtManager.getID(dt);
		return result;
	}
Associate a DataType with its ID (relative to the DataTypeManager) in an Entry
@param dt is the raw DataType
@return the Entry with both DataType and ID
Ghidra/Features/Decompiler/src/main/java/ghidra/app/util/DataTypeDependencyOrderer.java