### Question:
FP2Immutable { boolean iszilch() { return fp2.iszilch(); } FP2Immutable(FP2Immutable fp2Immutable);   FP2Immutable(FP2 fp2);   FP2Immutable(FP fpA, FP fpB);   FP2Immutable(BIG big1, BIG big2);   FP2Immutable(int c);   FP2Immutable(String hex1, String hex2); @Override String toString(); @Override boolean equals(Object obj); @Override int hashCode();  }### Answer:
@Test void isZilchTest() { assertTrue(ZERO.iszilch()); assertFalse(ONE.iszilch()); }