key in the list of options that may have been attached to the
pixbuf when it was loaded, or that may have been attached by another
For instance, the ANI loader provides "Title" and "Artist" options. The ICO, XBM, and XPM loaders provide "x_hot" and "y_hot" hot-spot options for cursor definitions. The PNG loader provides the tEXt ancillary chunk key/value pairs as options. Since 2.12, the TIFF and JPEG loaders return an "orientation" option string that corresponds to the embedded TIFF/Exif orientation tag (if present).
[character] the value associated with
Derived by RGtkGen from GTK+ documentation
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