@atlaskit/editor-core/dist/esm/utils/getNodesCount.js

A package contains Atlassian editor core functionality

// When experiment platform_editor_prosemirror_rendered_data is removed, review whether this helper is still needed.
export function getNodesCount(node) {
  var count = {};
  node.nodesBetween(0, node.nodeSize - 2, function (node) {
    count[node.type.name] = (count[node.type.name] || 0) + 1;
  });
  return count;
}