data class ProjectSubmittals(var submittals: ObservableList<Submittal>)
data class ProjectRFIs(var requestForInformations: ObservableList<RequestForInformation>)
data class ProjectPCOs(var potentialChangeOrders: ObservableList<PotentialChangeOrder>)
data class ProjectCOs(var changeOrders: ObservableList<ChangeOrder>)

class SubmittalsModel: ItemViewModel<ProjectSubmittals>() {

    val submittals = bind(ProjectSubmittals::submittals)
}
etc...