Binds a context value to a GObject property.
`source_key` must identify a registered variable compatible with the target property. GLib.BindingFlags.INVERT_BOOLEAN can only be used when both values are boolean. Other binding flags have the same meaning as in GLib.Object.bind_property.
| source_key |
the registered context key |
| target |
the object that owns the target property |
| target_property |
the target property name |
| flags |
flags controlling the binding |
|
the newly created binding |