code: def _add(c1, c2):
      """Helper function used to implement the ``<type>add`` functions."""
      # c1, c2 are trimmed copies
      [c1, c2] = as_series([c1, c2])
      if len(c1) > len(c2):
          c1[: c2.size] += c2
          ret = c1
      else:
          c2[: c1.size] += c1
          ret = c2
      return trimseq(ret)
  
imports: import operator
  import functools
  import warnings
  import numpy
  from numpy._core.multiarray import dragon4_positional, dragon4_scientific
  from numpy.exceptions import RankWarning
label_desc: Use image node_id 14 for calling a global function with example usage: _add(c1, c2) and returns: trimseq