This is part of the Fake.Installer.Wix module.

FeatureDisplay

Used for determing whether the feature should be visible in the select features installer pane or not

Union Cases

Union CaseDescription
Collapse
Signature:

Initially shows the feature collapsed. This is the default value.
Expand
Signature:

Initially shows the feature expanded.
Hidden
Signature:

Prevents the feature from displaying in the user interface.