group_encrypt_message_length
actual fun group_encrypt_message_length(session: OlmOutboundGroupSessionPointer, plainTextLength: ULong): ULong
actual fun group_encrypt_message_length(session: OlmOutboundGroupSessionPointer, plainTextLength: ULong): ULong
expect fun group_encrypt_message_length(session: OlmOutboundGroupSessionPointer, plainTextLength: ULong): ULong