src/language-graphql/printer-graphql.js/printSequence
function printSequence(sequencePath, options, print) {
  const count = sequencePath.getValue().length;

  return sequencePath.map((path, i) => {
    const printed = print(path);

    if (
      sharedUtil.isNextLineEmpty(
        options.originalText,
        path.getValue(),
        options
      ) &&
      i < count - 1
    ) {
      return concat([printed, hardline]);
    }

    return printed;
  });
}