code: def build_can_replace_mask(len_mask, mask):
      """
      Creates a cudf series representing can_replace_mask of length=len_mask
      if mask is None else returns mask
      """
      if mask is None:
          mask = cudf.Series(cp.ones(len_mask, dtype=bool))
      return mask
  
imports: from .porter_stemmer_utils.measure_utils import has_positive_measure, measure_gt_n, measure_eq_n
  from .porter_stemmer_utils.len_flags_utils import len_eq_n, len_gt_n
  from .porter_stemmer_utils.consonant_vowel_utils import contains_vowel, is_consonant
  from .porter_stemmer_utils.porter_stemmer_rules import ends_with_suffix, ends_with_double_constant, last_char_not_in, last_char_in, ends_cvc
  from .porter_stemmer_utils.suffix_utils import get_stem_series, get_str_replacement_series, replace_suffix
  from cuml.internals.safe_imports import gpu_only_import
label_desc: Use image node_id 5 for calling a global function with example usage: build_can_replace_mask(len_mask, mask) and returns: mask