### Question:
PrimitiveLongWrapper extends LongWrapper { @Override public boolean isPrimitiveWrapper() { return true; } PrimitiveLongWrapper();  PrimitiveLongWrapper(long value); @Override void set(Number v); @Override Long getDefault(); @Override boolean isPrimitiveWrapper(); @Override R accept(WrapperVisitor<R, P, Q, TH> visitor, P p, Q q);  }### Answer:
@Test void isPrimitiveWrapper() { PrimitiveLongWrapper wrapper = new PrimitiveLongWrapper(); assertTrue(wrapper.isPrimitiveWrapper()); }