code: def split_vector_ctype(ctype):
      
      if not is_vector_ctype(ctype):
          raise ValueError('The given ctype is not a vector type.')
      for vector_length in [2, 3, 4, 8, 16]:
          if ctype.endswith(str(vector_length)):
              vector_str_len = len(str(vector_length))
              return ctype[:-vector_str_len], int(ctype[-vector_str_len:])
docs: Split a vector ctype into a raw ctype and the vector length.
  
      If the given ctype is not a vector type, we raise an error. I
  
      Args:
           ctype (str): the ctype to possibly split into a raw ctype and the vector length
  
      Returns:
          tuple: the raw ctype and the vector length