code: def iscsr(X):
      return isinstance(X, cpu_sp.csr_matrix) or isinstance(
          X, gpu_sp.csr_matrix
      )
  
file_path: cuml/python/cuml/_thirdparty/sklearn/utils/sparsefuncs.py
imports: from ....thirdparty_adapters.sparsefuncs_fast import csr_mean_variance_axis0, csc_mean_variance_axis0
  from cuml.internals.safe_imports import cpu_only_import
  from cuml.internals.safe_imports import gpu_only_import
  from cuml.internals.safe_imports import gpu_only_import_from
  from cuml.internals.safe_imports import cpu_only_import_from
label_desc: Use image node_id 1 for calling a global function with example usage: iscsr(X) and returns: unknown