import { buildClient } from '@datocms/cma-client-node';
async function run() {
  const client = buildClient({ apiToken: '<YOUR_API_TOKEN>' });
  
  const modelIdOrApiKey = 'blog_post';
  
  const fieldset = await client.fieldsets.create(modelIdOrApiKey, {
    title: 'SEO-related fields',
    hint: 'Please fill in these fields!',
    position: 1,
    collapsible: true,
    start_collapsed: false
  });
  
  console.log(fieldset);
}
run();

{
  id: '93Y1C2sySkG4Eg0atBRIwg',
  title: 'SEO-related fields',
  hint: 'Please fill in these fields!',
  collapsible: true,
  start_collapsed: false,
  position: 1,
  item_type: {
    type: 'item_type',
    id: 'DxMaW10UQiCmZcuuA-IkkA'
  }
}