code: def save_all(expressions = {})
        conditions(expressions)
        klass = Parse::Model.find_class self.table
        if klass.blank?
          raise ArgumentError, "Parse model with class name #{self.table} is not registered."
        end
        hash_constraints = constraints(true)
  
        klass.save_all(hash_constraints, &Proc.new) if block_given?
        klass.save_all(hash_constraints)
      end
docs: Supporting the `save_all` method to be used in scope chaining with queries.
   @!visibility private