writeAsString method Null safety
Write a string to a file.
Opens the file, writes the string in the given encoding, and closes the
file. Returns a Future<File> that completes with this File object
once the entire operation has completed.
By default writeAsString creates the file for writing and truncates the file if it already exists. In order to append the bytes to an existing file, pass FileMode.append as the optional mode parameter.
If the argument flush is set to true, the data written will be
flushed to the file system before the returned future completes.
Implementation
Future<File> writeAsString(String contents,
{FileMode mode: FileMode.write,
Encoding encoding: utf8,
bool flush: false});