Gio.BufferedOutputStream.prototype.set_auto_grow

function set_auto_grow(auto_grow: Boolean): void {
    // Gjs wrapper for g_buffered_output_stream_set_auto_grow()
}
  

Sets whether or not the stream's buffer should automatically grow. If auto_grow is true, then each write will just make the buffer larger, and you must manually flush the buffer to actually write out the data to the underlying stream.