src/language-js/utils.js/isSkipOrOnlyBlock
function isSkipOrOnlyBlock(node) {
  return (
    (node.callee.type === "MemberExpression" ||
      node.callee.type === "OptionalMemberExpression") &&
    node.callee.object.type === "Identifier" &&
    node.callee.property.type === "Identifier" &&
    unitTestRe.test(node.callee.object.name) &&
    (node.callee.property.name === "only" ||
      node.callee.property.name === "skip")
  );
}