writeStringSync method
Synchronously writes a single string to the file using the given Encoding.
Throws a FileSystemException if the operation fails.
Implementation
void writeStringSync(String string, {Encoding encoding = utf8});© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-io/RandomAccessFile/writeStringSync.html