code: def check_from_spec(self, spec, expected):
      ri = splits.ReadInstruction.from_spec(spec)
      return self.check_from_ri(ri, expected)
  
imports: from tensorflow_datasets import testing
  from tensorflow_datasets.core import naming
  from tensorflow_datasets.core import proto
  from tensorflow_datasets.core import splits
  from tensorflow_datasets.core.utils import shard_utils
  import tensorflow_datasets.public_api
label_desc: Use image node_id 3 for calling the ReadInstructionTest obj's underlying member method code with example usage: obj.check_from_spec(spec, expected) and returns: self