deletions | additions       diff --git a/layout.md b/layout.md  index 245ad51..92f9c1a 100644  --- a/layout.md  +++ b/layout.md 
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Labeled_arrays__.md  Columnar_containers__.md  Graph_structures__.md  Resilient_Distributed_Datasets__.md  Implementation_specific_the_NumPy_ndarray__.md  Implementation_specific_the_R_data__.md