module Zeitwerk::Loader::EagerLoad

def eager_load_namespace(mod)
  raise Zeitwerk::SetupRequired unless @setup
  unless mod.is_a?(Module)
    raise Zeitwerk::Error, "#{mod.inspect} is not a class or module object"
  end
  return if @eager_loaded
  mod_name = real_mod_name(mod)
  return unless mod_name
  actual_roots.each do |root_dir, root_namespace|
    if Object.equal?(mod)
      # A shortcircuiting test depends on the invocation of this method.
      # Please keep them in sync if refactored.
      actual_eager_load_dir(root_dir, root_namespace)
    elsif root_namespace.equal?(Object)
      eager_load_child_namespace(mod, mod_name, root_dir, root_namespace)
    else
      root_namespace_name = real_mod_name(root_namespace)
      if root_namespace_name.start_with?(mod_name + "::")
        actual_eager_load_dir(root_dir, root_namespace)
      elsif mod_name == root_namespace_name
        actual_eager_load_dir(root_dir, root_namespace)
      elsif mod_name.start_with?(root_namespace_name + "::")
        eager_load_child_namespace(mod, mod_name, root_dir, root_namespace)
      else
        # Unrelated constant hierarchies, do nothing.
      end
    end
  end
end