code: def sum_low_rank(K):
      """Compute cumsum for LRdec type collections.
  
      equivalent of sum for LRdec type objects
  
      Parameters
      ----------
      K : LRdec type object to compute sum of
  
      Return
      ------
      LRdec type object for sum of K
      """
      return np.inner(sum(K.U), sum(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 27 for calling a global function with example usage: sum_low_rank(K) and returns: np