class_docstr: Base class of solver.
class_docstr_tok: ["Base","class","of","solver","."]
docstr: Get the task.
docstr_tok: ["Get","the","task","."]
code: def task(self):
      """Get the task."""
      return self._task
  
imports: import abc
  import math
  import delta.compat
  import tensorflow_addons
  from absl import logging
  from delta import utils
  from delta.utils import optimizer
  from delta.utils.register import registers
label_desc: Use image node_id 4 for calling the Solver obj's underlying member method code with example usage: obj.task() and returns: self