### Question:
Or extends LTLFormula { public LTLFormula copy() { ArrayList<LTLFormula> copiedChildren = new ArrayList<LTLFormula>(children.size()); for(LTLFormula child : children){ copiedChildren.add(child.copy()); } return new Or(copiedChildren); } Or(ArrayList<LTLFormula> children); LTLType getLTLType(); LTLFormula copy(); LinkedHashSet<LinkedHashSet<LTLFormula>> toSetForm(); ATransition d(HashMap<LTLFormula, ATransition> D); static void main(String args[]);  }### Answer:
@Test public void testCopy() { assertEquals(a_or_b, a_or_b.copy()); assertEquals(a_or_c, a_or_c.copy()); }