Clonable

All core objects are Clonables.

Fields	Methods (provided)	Methods (must be reimplemented)
	clone()

clone() will create a new object having the same content as the original. Using clone() avoids bad surprises like loss of information when assigning or unwanted modifications happening after an assignation etc.

For instance, in __init__(), you'd better write :

self._field = arg.clone()

instead of :

self._field = arg

Check Clonable's complete doc

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