code: def _check_versions(self):
      if lz4 is None:
          raise ValueError(LZ4_NOT_INSTALLED_ERROR)
      lz4_version = lz4.__version__
      if lz4_version.startswith("v"):
          lz4_version = lz4_version[1:]
      if LooseVersion(lz4_version) < LooseVersion("0.19"):
          raise ValueError(LZ4_NOT_INSTALLED_ERROR)
  
imports: import io
  import zlib
  from joblib.backports import LooseVersion
label_desc: Use image node_id 2 for calling the LZ4CompressorWrapper obj's underlying member method code with example usage: obj._check_versions() without return types