class GraphQL::Client::Schema::UnionType

def define_class(definition, ast_nodes)
  possible_type_names = definition.client.possible_types(type).map(&:graphql_name)
  possible_types = possible_type_names.map { |concrete_type_name|
    schema_module.get_class(concrete_type_name).define_class(definition, ast_nodes)
  }
  new(possible_types)
end

def initialize(type)
  unless type.kind.union?
    raise "expected type to be a Union, but was #{type.class}"
  end
  @type = type
end

def new(types)
  PossibleTypes.new(type, types)
end