Optional contentAttachment MIME type.
Optional dataBase64-encoded content. Available if attachment content is requested by using the query parameters
 attachments=true or atts_since. Note that when used with a view or changes feed include_docs must also be
 true.
Optional digestContent hash digest. It starts with prefix which announce hash type (e.g. md5-) and continues with
 Base64-encoded hash digest.
Optional encodedCompressed attachment size in bytes. Available if content_type was in list of compressible types when the
 attachment was added and the query parameter att_encoding_info is true. Note that when used with a view or
 changes feed include_docs must also be true.
Optional encodingCompression codec. Available if content_type was in list of compressible types when the attachment was added
 and the and the query parameter att_encoding_info is true. Note that when used with a view or changes feed
 include_docs must also be true.
Optional followsTrue if the attachment follows in a multipart request or response.
Optional lengthReal attachment size in bytes. Not available if inline attachment content requested.
Optional revposRevision number when attachment was added.
Optional stubHas true value if object contains stub info and no content. Otherwise omitted in response.
Static deserializeStatic serialize
Schema for an attachment.