code: def cumsum_rev_low_rank(K):
      """Compute cumsum for LRdec type collections.
  
      equivalent of cumsum_rev for LRdec type objects
  
      Parameters
      ----------
      K : LRdec type object to compute cumsum of
  
      Return
      ------
      LRdec type object for cumsum_rev of K
      """
      return LRdec(cumsum_rev_first(K.U), cumsum_rev_first(K.V))
  
imports: import collections
  from functools import partial
  import numpy
  from scipy.sparse.linalg import svds
  from sklearn.base import BaseEstimator, TransformerMixin
  from sktime.dists_kernels.base import BasePairwiseTransformerPanel
label_desc: Use image node_id 26 for calling a global function with example usage: cumsum_rev_low_rank(K) and returns: LRdec