Subject to change
Version 6 is currently in beta, so the API
may change in the next revisions.
Unless you need the new features of version 6 (e.g. MessagePack), please use version 5
Version 6 should stay in beta stage until 2019.
Copies the content of a
bool copyFrom(JsonObject obj) const;
JsonObject to copy.
true if the operation is successful; or
false if there was not enough room in the