Method OrderItem::setAttendeeDetailsRequired() expects an argument of type \OpenActive\Enums\PropertyEnumeration[] or null passing it an array of instances of Enums (GivenName & FamilyName) generates this syntax error:
PHP Parse error: syntax error, unexpected 'Abstract' (T_ABSTRACT), expecting identifier (T_STRING) in .../vendor/openactive/models/src/Enums/PropertyEnumeration.php on line 88
Line 88 of \OpenActive\Enums\PropertyEnumeration attempts to declare a const called Abstract, which isn't allowed.
