new_contents: from enum import Enum
  
  
  class PrimitiveType(Enum):
      """
      Enum for primitive structures.
      """
  
      bool = None  # auto assigned 0
      int8 = None  # auto assigned 1
      int16 = None  # ...
      int32 = None
      int64 = None
      unsigned_int8 = None
      unsigned_int16 = None
      unsigned_int32 = None
      unsigned_int64 = None
      half = None
      float = None
      double = None
      string = None
      ref = None
      type = None
  
subject: Add PrimitiveType enum