metadata_save_filter

Filters the metadata retrieved from the image with [method@Gimp.

Image.metadata_save_prepare], taking into account the passed flags.

*Note: There is normally no need to call this function because it's already called by [class@ExportProcedure] after the `run()` callback.*

Note that the this passed to this function might be different from the image passed to `gimp_image_metadata_save_prepare()`, due to whatever file export conversion happened in the meantime

This can be used as an alternative to core metadata handling when you want to save metadata yourself and you need only filtering processing.

Parameters:

this	The actually saved image
mime_type	The saved file's mime-type
metadata	The metadata to export
flags	Flags to specify what of the metadata to save
file	The file this was saved to or NULL if file was not saved yet

Returns:

Filtered metadata or null in case of failure. Use [GObject.Object.unref] when returned metadata are no longer needed