code: def depgraph_to_dotsrc(dep_graph, show_cycles, nodot, reverse):
      
      if show_cycles:
          dotsrc = cycles2dot(dep_graph, reverse=reverse)
      elif not nodot:
          dotsrc = dep2dot(dep_graph, reverse=reverse)
      else:
          dotsrc = None
      return dotsrc
docs: Convert the dependency graph (DepGraph class) to dot source code.