def execute(self):
    if self.get_options().skip:
      return
    targets = self.context.targets(self._is_checked)
    with self.invalidated(targets) as invalidation_check:
      invalid_targets = [vt.target for vt in invalidation_check.invalid_vts]
      sources = self.calculate_sources(invalid_targets)
      if sources:
        result = self.checkstyle(invalid_targets, sources)
        if result < 0:
          raise TaskError('java {main} ... exited non-zero ({result})'.format(
            main=self._CHECKSTYLE_MAIN, result=result))
dataset/ETHPy150Open pantsbuild/pants/src/python/pants/backend/jvm/tasks/checkstyle.py/Checkstyle.execute/operator `!=` -> `<`