class Grape::Validations::Validators::MultipleParamsBase

def all_keys
  attrs.map { |attr| @scope.full_name(attr) }
end

def keys_in_common(resource_params)
  return [] unless resource_params.is_a?(Hash)
  all_keys & resource_params.keys.map! { |attr| @scope.full_name(attr) }
end

def validate!(params)
  attributes = MultipleAttributesIterator.new(self, @scope, params)
  array_errors = []
  attributes.each do |resource_params|
    validate_params!(resource_params)
  rescue Grape::Exceptions::Validation => e
    array_errors << e
  end
  raise Grape::Exceptions::ValidationArrayErrors.new(array_errors) if array_errors.any?
end