protected DataTypeSelectionEditor createEditor(ServiceProvider sp,
			AllowedDataTypes allowedDataTypes) {
		return new DataTypeSelectionEditor(dtm, sp, allowedDataTypes);
	}
A dialog that allows the user to choose from available data types or create new ones.
Ghidra/Features/Base/src/main/java/ghidra/app/util/datatype/DataTypeSelectionDialog.java