custom property
Custom is true when the org replaced the shared playbook with one of its own — the difference between "everyone's checklist" and "the one you authored".
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
bool? custom;