class RailsBand::Configuration::Consumers
Consumers is a wrapper of ActiveSupport::HashWithIndifferentAccess, which validates the value on #[]=.
def []=(key, value)
def []=(key, value) unless value.respond_to?(:call) raise ArgumentError, "The value for `#{key.inspect}` must have #call: the passed one is `#{value.inspect}`" end super(key, value) end