public DWARFDataType getDDTByInstance(DataType dtInstance) {
		return dataTypeInstanceToDDTMap.get(dtInstance);
	}
Create a new data type importer.

@param prog {@link DWARFProgram} that is being imported
@param dwarfDTM {@link DWARFDataTypeManager} helper
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFDataTypeImporter.java