private static DataFlavor createLocalDataTypeFlavor() {
		try {
			return new GenericDataFlavor(DataFlavor.javaJVMLocalObjectMimeType +
				"; class=ghidra.program.model.data.DataTypeImpl", "Local data type object");
		}
		catch (Exception e) {
			Msg.showError(DataTypeTransferable.class, null, null, null, e);
		}
		return null;
	}
Defines data that is available for drag/drop and clipboard transfers.
The data is a DataType object.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeTransferable.java