class_docstr: Chroma wrapper
class_docstr_tok: ["Chroma","wrapper"]
code: def list_collections(self):
      return self.client.list_collections()
  
imports: from enum import auto, Enum
  import os
  import string
  from absl import logging
  import chromadb
  from chromadb.config import Settings
  from chromadb.utils import embedding_functions
  from chromadb.api.models import Collection
  from chromadb.api.types import QueryResult
  from palm import PaLM
label_desc: Use image node_id 2 for calling the Chroma obj's underlying member method code with example usage: obj.list_collections() and returns: self