Statement (Statement head) { Statement res; if ((res = DoStatement.isHead(head)) != null) { return res; } if ((res = SwitchStatement.isHead(head)) != null) { return res; } if ((res = IfStatement.isHead(head)) != null) { return res; } // synchronized statements will be identified later // right now they are recognized as catchall if ((res = SequenceStatement.isHead2Block(head)) != null) { return res; } if ((res = CatchStatement.isHead(head)) != null) { return res; } if ((res = CatchAllStatement.isHead(head)) != null) { return res; } return null; }