Approvals Approvals for Administrators Configuring Settings Current: Approval Custom Classes PDF Download PDF Download page Approval Custom Classes. Current page Include child pages All pages Approval Custom Classes Approval custom classes used to register custom classes that Implement Global interfaces exposed by Conga for customization.ClassesPurpose of the classInbound Attachment Callback ClassInbound attachment callback class name. The class should implement the CustomClass.IInboundAttachmentCallback interface.Query Callback ClassQuery callback class name. The class should implement the CustomClass.IQueryCallback interface. ×