output method
Executes the {@linkcode Deno.Command}, waiting for it to finish and
collecting all of its output.
If spawn() was called, calling this function will collect the remaining
output.
Will throw an error if stdin: "piped" is set.
If options stdout or stderr are not set to "piped", accessing the
corresponding field on {@linkcode Deno.CommandOutput} will throw a TypeError.
Implementation
_i2.Future<_i4.CommandOutput> output() => _i3.promiseToFuture(_i3.callMethod(
this,
'output',
[],
));