class_docstr: Mark the source as an iterator in [0, extent).
  
  Parameters
  ----------
  source : PrimExpr.
      The source expression.
  
  extent : PrimExpr
      The extent of the iterator.
code: def __init__(self, source, extent):
      self.__init_handle_by_constructor__(
          _ffi_api.IterMark, source, extent
      )
  
imports: from enum import IntEnum
  import tvm._ffi
  from tvm.runtime import Object
  from tvm.ir import PrimExpr
  from .None import _ffi_api
label_desc: Use image node_id 1 to create a new IterMark object from inherited base classes: Object with example: obj = IterMark(source, extent)