NullStmt extends Stmt { @Override public NullStmt clone() { return new NullStmt(); }  @Override void accept(IAstVisitor visitor); @Override NullStmt clone();  }
@Test public void testNullStmt() { assertEquals(";\n", new NullStmt().getText()); final NullStmt nullStmt = new NullStmt(); assertNotSame(nullStmt, nullStmt.clone()); }