docs: def _simplify_block(self, ail_block, stack_pointer_tracker=None):
          """
          Simplify a single AIL block.
  
          :param ailment.Block ail_block: The AIL block to simplify.
          :param stack_pointer_tracker:   The RegisterDeltaTracker analysis instance.
          :return:                        A simplified AIL block.
          """
  
          simp = self.project.analyses.AILBlockSimplifier(ail_block, stack_pointer_tracker=stack_pointer_tracker)
          return simp.result_block