code: def Title(self):
          
          title = ''
          if self.title:
              title = self.title
          else:
              sampletype = self.getSampleType()
              if sampletype:
                  title = sampletype.Title()
          return safe_unicode(title).encode('utf-8')
docs: Return the title if possible, else return the Sample type.
          Fall back on the instance's ID if there's no sample type or title.