def method_missing(sym, *args, &block)
      type = sym.to_s
      if type.start_with?('_') && args.empty? && block.nil?
        constant = Object.const_get(type[1..-1])
        type(constant)
      else
        super
      end
    end
def method_missing(sym, *args, &block)
      type = sym.to_s
      if type.start_with?('_') && args.empty? && block.nil?
        constant = Object.const_get(type[1..-1])
        type(constant)
      else
        super
      end
    end
Convenient way to create {Schemas::Type} schemas

 See {#type} for details.

 @see #type