gCancellableNew
Creates a new GCancellable object.
gCancellableNew()
Applications that want to start one or more operations
that should be cancellable should create a GCancellable
and pass it to the operations.
One GCancellable can be used in multiple consecutive
operations, but not in multiple concurrent operations.
[GCancellable] a GCancellable.
Derived by RGtkGen from GTK+ documentation
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