Plaintext
Value
An S7 object of class Plaintext, inheriting from OpenFHEObject,
whose ptr property holds an external pointer to the C++ plaintext.
A plaintext holds an encoded but unencrypted vector together with
its encoding type; obtain one from a make_*_plaintext() factory or
from decrypt() rather than by calling this constructor directly,
and read its contents with get_packed_value(), get_real_value()
and the other accessors.