text: import json
  import random
  import string
  
  from dss.util.json_gen.hca_generator import HCAJsonGenerator
  
  
  def id_generator(size=30, chars=string.ascii_uppercase + string.digits):
      return ''.join(random.choice(chars) for _ in range(size))
  
  
  schema_urls = [
      "https://schema.humancellatlas.org/bundle/5.1.0/project",
      "https://schema.humancellatlas.org/bundle/5.1.0/submission",
      "https://schema.humancellatlas.org/bundle/5.1.0/ingest_audit",
  ]
  
  json_faker = None
  
  def generate_sample() -> str:
      global json_faker
      if json_faker is None:
          json_faker = HCAJsonGenerator(schema_urls)
      return json_faker.generate()
  