charset, content-type and transfer-encoding for each part of email

[Cherviakov]

Good day, in my task I need to parse email and specify charset, content-type and transfer-encoding value for each part of email, but in mailparser API there seems no way to get them. Is there some side way for this or can be this data added on demand?

--00000000000022b47505ba914d5c
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Actually is it possible to also for each parsed part provide raw data from which it was parsed? Then in case we need to parse some additional details we can do that from this piece, instead of parsing whole rawEmail.