int32 WriteFieldHeaderAndPayload ( FNetBitWriter & Bunch, const [FClassNetCache](API\Runtime\CoreUObject\UObject\FClassNetCache) * ClassCache, const [FFieldNetCache](API\Runtime\CoreUObject\UObject\FFieldNetCache) * FieldCache, [FNetFieldExportGroup](API\Runtime\Engine\Engine\FNetFieldExportGroup) * NetFieldExportGroup, FNetBitWriter & Payload, bool bIgnoreInternalAck )