[ CCode ( cname = "G_FILE_ATTRIBUTE_PREVIEW_ICON" ) ]
[ Version ( since = "2.20" ) ]
public const string PREVIEW_ICON
A key in the "preview" namespace for getting a Icon that can be used to get preview of the file.
For example, it may be a low resolution thumbnail without metadata.
Corresponding FileAttributeType is g_file_attribute_type_object.
The value for this key should contain a Icon.