public async Task Write(Arguments arguments, CancellationToken cancellationToken)
        {
            var profiles = await profileReader.ReadFiles(arguments.Inputs, cancellationToken);

            var input   = profiles.Concat(profileReader.ReadVariables(arguments.Variables));
            var schemes = await profileReader.ReadFiles(arguments.Schemes, cancellationToken);

            var usedNames = input.OfType <Payload>()
                            .Select(p => p.Name)
                            .Distinct()
                            .ToList();

            await Task.WhenAll(
                from scheme in treeBuilder.BuildScheme(schemes, usedNames).AsParallel()
                from tree in treeBuilder.Build(input, scheme.GetSubstituteTypes())
                from alteredScheme in treeBuilder.BuildScheme(
                    scheme.WithImplicitHiddenKeys(tree),
                    usedNames)
                from pair in formatterBuilder.Build(alteredScheme)
                from subTree in tree.GetSubTrees(pair.prefix) // RK TODO: Logging if no suitable subtrees.
                select pair.formatter.Write(subTree, cancellationToken));
        }