`GFileDescriptorBased` is an interface for file descriptor based IO.
It is implemented by streams (implementations of [class@Gio.InputStream] or [class@Gio.OutputStream]) that are based on file descriptors.
Note that `<gio/gfiledescriptorbased.h>` belongs to the UNIX-specific GIO interfaces, thus you have to use the `gio-unix-2.0.pc`
pkg-config file or the `GioUnix-2.0` GIR namespace when using it.