The name of the schema that describes the types of keys for this #GSettings object.
The type of this property is *not* #GSettingsSchema. #GSettingsSchema has only existed since version 2.32 and unfortunately this name was used in previous versions to refer to the schema ID rather than the schema itself. Take care to use the 'settings-schema' property if you wish to pass in a #GSettingsSchema.
Deprecated: Use the 'schema-id' property instead. In a future version, this property may instead refer to a #GSettingsSchema.
Get schema property.