preview property
Preview is the config every branch build other than the production branch runs under. It is a SEPARATE set of bindings and variables, which is what lets a preview point at test data.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
PagesDeploymentConfig? preview;