def offset(value = nil, &block)
      chain { criteria.update_request_options from: block || Integer(value) }
    end
def offset(value = nil, &block)
      chain { criteria.update_request_options from: block || Integer(value) }
    end
Sets elasticsearch `from` search request param

 @example
  UsersIndex.filter{ name == 'Johny' }.offset(300)
     # => {body: {
            query: {...},
            from: 300
          }}