Represents a part of a form-data entity, typically used in multipart requests.
The raw content of the form part.
The MIME type of the content associated with this part. Can be null if not specified.
The filename associated with this part, commonly used for file uploads. Can be null if not applicable.
additional headers present in the form part (e.g., Content-Transfer-Encoding, Content-ID, custom headers).
The name of the form field associated with this part. Can be null if not provided.