docs: def load(self, ymlfile=None):
          """Load and process the YAML file"""
          if ymlfile is not None:
              self.ymlfile = ymlfile
  
          try:
              # If yaml should be 'cleaned' of document references
              if self._clean:
                  self.data = self.process(self.ymlfile)
              else:
                  with open(self.ymlfile, 'rb') as stream:
                      for data in yaml.load_all(stream):
                          self.data.append(data)
  
              self.loaded = True
          except ScannerError, e:
              msg = "YAML formattting error - '" + self.ymlfile + ": '" + str(e) + "'"
              raise util.YAMLError(msg)