code: def highlight_code(self, ontospy_entity):
          
          try:
              pygments_code = highlight(ontospy_entity.rdf_source(),
                                        TurtleLexer(), HtmlFormatter())
              pygments_code_css = HtmlFormatter().get_style_defs('.highlight')
              return {
                  "pygments_code": pygments_code,
                  "pygments_code_css": pygments_code_css
              }
          except Exception as e:
              printDebug("Error: Pygmentize Failed", "red")
              return {}
docs: produce an html version of Turtle code with syntax highlighted
          using Pygments CSS