code: def get_location(source, position):
      lines = source.body[:position].splitlines()
      if lines:
          line = len(lines)
          column = len(lines[-1]) + 1
      else:
          line = 1
          column = 1
      return SourceLocation(line, column)
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_location(source, position) and returns: SourceLocation