lib/utils/yamlAstParser.js/findKeyChain
const findKeyChain = astContent => {
  let content = astContent;
  const chain = [content.key.value];
  while (content.parent) {
    content = content.parent;
    if (content.key) {
      chain.push(content.key.value);
    }
  }
  return chain.reverse().join('.');
};