code: def register_rml(self, filepath, **kwargs):
          
          name = os.path.split(filepath)[-1]
          if name in self.rml_maps and self.rml_maps[name] != filepath:
              raise Exception("RML name already registered. Filenames must be "
                              "unique.",
                              (self.rml_maps[name], filepath))
          self.rml_maps[name] = filepath
docs: Registers the filepath for an rml mapping
  
          Args:
          -----
              filepath: the path the rml file