in versioned_plugins.rb [421:429]
def fetch_stack_versions
current_stack_versions = resolve_current_versions
@stack_version = get_stack_version(current_stack_versions)
puts "Stack version: #{@stack_version}\n"
@ecs_version = get_ecs_version(current_stack_versions)
puts "ECS version: #{@ecs_version}\n"
end