When defining a custom formatter for the Elixir Logger, is there a way for a structured report to be passed to it as a map or a Keyword list instead of being formatted as the iolist?

I.e. for a call Logger.info(%{test: "report"}), I’d like it to be accessible in the formatter in the structured form:

config.ex:

config: :logger, :console,
  format: {MyFormatter, :format}

formatter.ex:

defmodule MyFormatter do
  def format(level, msg, {date, time}, meta) do
     %% The `msg` here is an iolist instead of being passed as a map or Keyword.t
  end
end