'Collects any information that\'s necessary to execute this transformer\'s
transform method.'

@classmethod
def collect(cls, block_structure):

    block_structure.request_xblock_fields('graded', 'format', 'display_name', 'category', 'due', 'show_correctness')
    StudentViewTransformer.collect(block_structure)
    BlockCountsTransformer.collect(block_structure)
    BlockDepthTransformer.collect(block_structure)
    BlockNavigationTransformer.collect(block_structure)
