Function _isOpeningComment

packages/compiler/src/i18n/extractor_merger.ts:666–668

(n: html.Node)

}

function _isOpeningComment(n: html.Node): boolean {
  return !!(n instanceof html.Comment && n.value && n.value.startsWith('i18n'));
}

function _isClosingComment(n: html.Node): boolean {
  return !!(n instanceof html.Comment && n.value && n.value === '/i18n');