How to use the @uform/core.isStateModel function in @uform/core

dispatch.lazy(type, () => {
        return isStateModel(payload) ? payload.getState() : payload
      })
    })

dispatch.lazy(type, () => {
            return isStateModel(payload) ? payload.getState() : payload
          })
          if (type === LifeCycleTypes.ON_FORM_INPUT_CHANGE) {

({ type, payload }: { type: string; payload: IModel }) => {
          dispatch.lazy(type, () => {
            return isStateModel(payload) ? payload.getState() : payload
          })
          if (type === LifeCycleTypes.ON_FORM_INPUT_CHANGE) {
            if (props.onChange) {
              props.onChange(
                isStateModel(payload)
                  ? payload.getState((state: IFormState) => state.values)
                  : {}
              )
            }
          }
          if (broadcast) {
            broadcast.notify({ type, payload })
          }
        }
      ),