gFileLoadPartialContentsAsync(). The data is always
zero-terminated, but this is not included in the resultant length.gFileLoadPartialContentsFinish(object, res, .errwarn = TRUE)objectGFile.resGAsyncResult.TRUE if the load was successful. If FALSE and error is
present, it will be set appropriately.contentslengthNULL if the length is not neededetag.outNULL if the entity tag is not needederrorGError, or NULL