### Question:
BitFieldDataType extends AbstractDataType { @Override public BitFieldDataType clone(DataTypeManager dtm) { if (dtm == dataMgr) { return this; } try { return new BitFieldDataType(baseDataType.clone(dtm), bitSize, bitOffset); } catch (InvalidDataTypeException e) { throw new AssertException("unexpected", e); } } protected  BitFieldDataType(DataType baseDataType, int bitSize, int bitOffset); protected  BitFieldDataType(DataType baseDataType, int bitSize); boolean isZeroLengthField(); static int getEffectiveBitSize(int declaredBitSize, int baseTypeByteSize); static int getMinimumStorageSize(int bitSize); static int getMinimumStorageSize(int bitSize, int bitOffset); static void checkBaseDataType(DataType baseDataType); static boolean isValidBaseDataType(DataType baseDataType); @Override void addParent(DataType dt); int getBaseTypeSize(); int getStorageSize(); int getBitSize(); int getDeclaredBitSize(); int getBitOffset(); DataType getBaseDataType(); AbstractIntegerDataType getPrimitiveBaseDataType(); @Override final SettingsDefinition[] getSettingsDefinitions(); @Override final boolean isEquivalent(DataType dt); @Override final int hashCode(); @Override final boolean equals(Object obj); @Override Settings getDefaultSettings(); @Override final DataType copy(DataTypeManager dtm); @Override BitFieldDataType clone(DataTypeManager dtm); @Override int getLength(); @Override String getDescription(); @Override Object getValue(MemBuffer buf, Settings settings, int length); @Override Class<?> getValueClass(Settings settings); @Override String getRepresentation(MemBuffer buf, Settings settings, int length); @Override void setDefaultSettings(Settings settings); @Override int getAlignment(); @Override String toString();  }### Answer:
@Test public void testClone() throws Exception { BitFieldDataType bf = new BitFieldDataType(UnsignedIntegerDataType.dataType, 1); assertEquals(UnsignedIntegerDataType.dataType, bf.getBaseDataType()); BitFieldDataType bfClone = bf.clone(null); assertEquals(UnsignedIntegerDataType.dataType, bfClone.getBaseDataType()); assertEquals(bfClone, bf); DataType typeDef = new TypedefDataType("Foo", LongDataType.dataType); bf = new BitFieldDataType(typeDef, 1); assertEquals(typeDef, bf.getBaseDataType()); bfClone = bf.clone(null); assertEquals(typeDef, bfClone.getBaseDataType()); assertEquals(bfClone, bf); }