### Question:
PrimitiveByteWrapper extends ByteWrapper { @Override public Byte getDefault() { return defaultValue; } PrimitiveByteWrapper();  PrimitiveByteWrapper(byte value); @Override void set(Number v); @Override Byte getDefault(); @Override boolean isPrimitiveWrapper(); @Override R accept(WrapperVisitor<R, P, Q, TH> visitor, P p, Q q);  }### Answer:
@Test void getDefault() { PrimitiveByteWrapper wrapper = new PrimitiveByteWrapper(); assertEquals((byte) 0, wrapper.getDefault()); }