private void GraphNodeAction(IBuildTask buildTask)
{
// At this point all dependencies will have been evaluated.
var dependenciesResults = GetResults(buildTask.Dependencies);
var taskSignature = buildTask.Signature(SourceDir, dependenciesResults);
AssertUniqueSignature(buildTask, taskSignature);
var buildTaskResult = ExecuteBuildTask(buildTask, taskSignature, dependenciesResults);
buildTasksToResults.TryAdd(buildTask, buildTaskResult);
}
