Hasura dataprovider : How to query with _not operator ?

How can i query data with _not operator like this

query query {
  event(where: {_not: {group_event: {event__id: {_is_null: false}}}}, limit: 10) {
    id
    group_event {
      event__id
    }
  }
}

query query {
  event(where: {_not: {group_event: {event__id: {_is_null: false}}}}, limit: 10) {
    id
    group_event {
      event__id
    }
  }
}

query query {
  event(where: {_not: {group_event: {event__id: {_is_null: false}}}}, limit: 10) {
    id
    group_event {
      event__id
    }
  }
}

query query {
  event(where: {_not: {group_event: {event__id: {_is_null: false}}}}, limit: 10) {
    id
    group_event {
      event__id
    }
  }
}