code: def removeClass(self, className):
          '''
              removeClass - remove a class name if present. Returns the class name if  removed, otherwise None.
  
                  @param className <str> - The name of the class to remove
  
                  @return <str> - The class name removed if one was removed, otherwise None if #className wasn't present
          '''
          className = stripWordsOnly(className)
  
          if not className:
              return None
  
          if ' ' in className:
              # Multiple class names passed, do one at a time
              for oneClassName in className.split(' '):
                  self.removeClass(oneClassName)
              return
  
          myClassNames = self._classNames
  
          # If not present, this is a no-op
          if className not in myClassNames:
              return None
  
  
          myClassNames.remove(className)
  
          return classNamf removeClass(self, className):
          '''
              removeClass - remove a class name if present. Returns the class name if  removed, otherwise None.
  
                  @param className <str> - The name of the class to remove
  
                  @return <str> - The class name removed if one was removed, otherwise None if #className wasn't present
          '''
          className = stripWordsOnly(className)
  
          if not className:
              return None
  
          if ' ' in className:
              # Multiple class names passed, do one at a time
              for oneClassName in className.split(' '):
                  self.removeClass(oneClassName)
              return
  
          myClassNames = self._classNames
  
          # If not present, this is a no-op
          if className not in myClassNames:
              return None
  
  
          myClassNames.remove(className)
  
          return className
docs: removeClass - remove a class name if present. Returns the class name if  removed, otherwise None.
  
                  @param className <str> - The name of the class to remove
  
                  @return <str> - The class name removed if one was removed, otherwise None if #className wasn't present