class_docstr: Interface for defining a custom :class:`~ray.data.Dataset` datasource.
  
  To read a datasource into a dataset, use :meth:`~ray.data.read_datasource`.
class_docstr_tok: ["Interface","for","defining","a","custom",":","class",":","`","~ray.data.Dataset","`","datasource",".","To","read","a","datasource","into","a","dataset",",","use",":","meth",":","`","~ray.data.read_datasource","`","."]
code: def should_create_reader(self) -> bool:
      has_implemented_get_read_tasks = (
          type(self).get_read_tasks is not Datasource.get_read_tasks
      )
      has_implemented_estimate_inmemory_data_size = (
          type(self).estimate_inmemory_data_size
          is not Datasource.estimate_inmemory_data_size
      )
      return (
          not has_implemented_get_read_tasks
          or not has_implemented_estimate_inmemory_data_size
      )
  
imports: import warnings
  from typing import Any, Callable, Iterable, List, Optional
  import numpy
  import ray
  from ray.data._internal.execution.interfaces import TaskContext
  from ray.data._internal.util import _check_pyarrow_version
  from ray.data.block import Block, BlockAccessor, BlockMetadata
  from ray.data.context import DataContext
  from ray.types import ObjectRef
  from ray.util.annotations import Deprecated, DeveloperAPI, PublicAPI
label_desc: Use image node_id 10 for calling the Datasource obj's underlying member method code with example usage: obj.should_create_reader() and returns: unknown