Checks if a file is a symlink.
It is an error to call this if the #GFileInfo does not contain gio.types.FILE_ATTRIBUTE_STANDARD_IS_SYMLINK.
true if the given info is a symlink.
Checks if a file is a symlink.
It is an error to call this if the #GFileInfo does not contain gio.types.FILE_ATTRIBUTE_STANDARD_IS_SYMLINK.