src/transformers/models/graphormer/collating_graphormer.py/GraphormerDataCollator/__init__
class GraphormerDataCollator:    def __init__(self, spatial_pos_max=20, on_the_fly_processing=False):
        if not is_cython_available():
            raise ImportError("Graphormer preprocessing needs Cython (pyximport)")

        self.spatial_pos_max = spatial_pos_max
        self.on_the_fly_processing = on_the_fly_processing