code: def _square_root_channels(*projectables):
      """Return the square root of the channels, preserving the attributes."""
      results = []
      for projectable in projectables:
          attrs = projectable.attrs
          projectable = np.sqrt(projectable)
          projectable.attrs = attrs
          results.append(projectable)
      return results
  
imports: import logging
  import numpy
  from satpy.composites import GenericCompositor
  from satpy.dataset import combine_metadata
label_desc: Use image node_id 3 for calling a global function with example usage: _square_root_channels() and returns: results