dsl

class Contract
  INVALID = Object.new.freeze

  COERCERS = {
    string: ->(v) { v.is_a?(String) ? v : v.to_s },
    integer: ->(v) { Integer(v.to_s) rescue INVALID },

class DynamicFinder
  def initialize(records)
    @records = records
  end

  def method_missing(method_name, *args, &block)