new_contents: """
  Cloning resources.
  
  """
  from marshmallow import fields, Schema, post_load
  
  
  class SubstitutionSchema(Schema):
      fromValue = fields.UUID(required=True, attribute="from_value")
      toValue = fields.UUID(required=True, attribute="to_value")
  
  
  class NewCloneSchema(Schema):
      commit = fields.Boolean(
          missing=True,
          required=False,
      )
      substitutions = fields.List(
          fields.Nested(SubstitutionSchema),
          missing=[],
          required=False,
      )
  
      @post_load
      def flatten(self, obj):
          obj["substitutions"] = {
              item["from_value"]: item["to_value"]
              for item in obj["substitutions"]
          }
  
subject: Add shared cloning resources