module ActiveSupport::Deprecation::Behavior

object that responds to +call+.
value. As with +behavior=+, this can be a single value, array, or an
ActiveSupport::Deprecation.disallowed_warnings=) to the specified
Sets the behavior for disallowed deprecations (those configured by

def disallowed_behavior=(behavior)
  @disallowed_behavior = Array(behavior).map { |b| DEFAULT_BEHAVIORS[b] || arity_coerce(b) }
end