The anchors that present the feature's UI for a
specific UI hook. It should be noted some anchors
may be retrieved before a BuildContext is
available, in which case the context parameter
will be null. In such cases, the anchor will defer
the creation of the anchor UI via a Builder -
refer to the documentation of the specific
FeatureAnchor documentation for more
information.
Callback to initialize the Feature. This method
is called when the feature is registered and should
not be invoked directly. It should also be noted
that the registeredFeatures map is a map of all
the features that have been registered with the
feature registry up to the point when this feature
is registered.
Returns a widget that once inserted into the tree
will provide the feature to all the children of the
widget. The widget from the scope method must be
the parent of any FeatureContainer within which
this feature's UI will be surfaced. The same applies
even if the feature service required is not UI related.