class Dry::Schema::Key::Array

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

def dump
  [name, member.dump]
end

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

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

def write(source, target)
  read(source) { |value|
    target[coerced_name] = value.is_a?(::Array) ? value.map { |el| member.write(el) } : value
  }
end