gitlab-org--gitlab-foss/app/assets/javascripts/vue_merge_request_widget/queries/toggle_wip.mutation.graphql

mutation toggleWIPStatus($projectPath: ID!, $iid: String!, $wip: Boolean!) {
  mergeRequestSetWip(input: { projectPath: $projectPath, iid: $iid, wip: $wip }) {
    mergeRequest {
      title
      workInProgress
    }
    errors
  }
}