The name of the page to inject, which is used when the field type is not sufficient to identify the page (for
example, when the field type is an interface implemented by the page).
The name of the page to inject, which is used when the field type is not sufficient to identify the page (for
example, when the field type is an interface implemented by the page). A non-blank value here overrides the
lookup by class name (from the field type).