How to use the @yarnpkg/parsers.stringifySyml function in @yarnpkg/parsers

compatibilityMode: false,
        }),

        linkType: pkg.linkType.toLowerCase(),

        resolution: structUtils.stringifyLocator(pkg),
        checksum: this.storedChecksums.get(pkg.locatorHash),
      };
    }

    const header = `${[
      `# This file is generated by running "yarn install" inside your project.\n`,
      `# Manual changes might be lost - proceed with caution!\n`,
    ].join(``)}\n`;

    return header + stringifySyml(optimizedLockfile);
  }

throw new ReportError(MessageName.AUTOMERGE_IMMUTABLE, `Cannot autofix a lockfile when running an immutable install`);

  const [left, right] = getVariants(file);

  let parsedLeft;
  let parsedRight;

  try {
    parsedLeft = parseSyml(left);
    parsedRight = parseSyml(right);
  } catch (error) {
    throw new ReportError(MessageName.AUTOMERGE_FAILED_TO_PARSE, `The individual variants of the lockfile failed to parse`);
  }

  const merged = Object.assign({}, parsedLeft, parsedRight);
  const serialized = stringifySyml(merged);

  await xfs.changeFilePromise(lockfilePath, serialized);

  return true;
}

const nextValue = typeof patch[key] === `function`
        ? patch[key](currentValue)
        : patch[key];

      if (currentValue === nextValue)
        continue;

      current[key] = nextValue;
      patched = true;
    }

    if (!patched)
      return;

    await xfs.changeFilePromise(configurationPath, stringifySyml(current));
  }