src/language-handlebars/printer-glimmer.js/printElseIfBlock
function printElseIfBlock(path, print) {
  const parentNode = path.getParentNode(1);

  return concat([
    printInverseBlockOpeningMustache(parentNode),
    "else ",
    printPathAndParams(path, print),
    printInverseBlockClosingMustache(parentNode),
  ]);
}