copy abstract method

Future<File> copy(String newPath)

Copy this file. Returns a Future<File> that completes with a File instance for the copied file.

If newPath identifies an existing file, that file is replaced. If newPath identifies an existing directory, the operation fails and the future completes with an exception.

Source

Future<File> copy(String newPath);

© 2012 the Dart project authors
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https://api.dartlang.org/stable/1.24.3/dart-io/File/copy.html