class_docstr: Wrapper for datasets from the [Open Graph Benchmark (OGB)](https://ogb.stanford.edu/).
  
  **Arguments**
  
  - `dataset`: an OGB library-agnostic dataset.
code: def read(self):
      if len(self.dataset) > 1:
          return [Graph(*_elem_to_numpy(elem)) for elem in self.dataset]
      else:
          # OGB crashed if we try to iterate over a NodePropPredDataset
          return [Graph(*_elem_to_numpy(self.dataset[0]))]
  
imports: import numpy
  from spektral.data import Dataset, Graph
  from spektral.utils import sparse
label_desc: Use image node_id 2 for calling the OGB obj's underlying member method code with example usage: obj.read() and returns: unknown, list