class Dry::Schema::Key::Hash

def coercible(&coercer)
  new(coercer: coercer, members: members.coercible(&coercer))
end

def dump
  { name => members.map(&:dump) }
end

def initialize(id, members:, **opts)
  super(id, **opts)
  @members = members
end

def read(source)
  super if source.is_a?(::Hash)
end

def stringified
  new(name: name.to_s, members: members.stringified)
end

def write(source, target)
  read(source) { |value|
    target[coerced_name] = value.is_a?(::Hash) ? members.write(value) : value
  }
end