with all the formats added to builder
ContentFormatsBuilder.toFormats
gdk.content_formats.ContentFormats toFormats()Creates a new [gdk.content_formats.ContentFormats] from the given builder.
The given [gdk.content_formats_builder.ContentFormatsBuilder] is reset once this function returns; you cannot call this function multiple times on the same builder instance.
This function is intended primarily for bindings. C code should use [gdk.content_formats_builder.ContentFormatsBuilder.freeToFormats].
Returns
the newly created [gdk.content_formats.ContentFormats]