code: def getFluvialLinks(self):
          
          # Define fluvial types
          fluvialTypeKeywords = ('TRAPEZOID', 'TRAP', 'BREAKPOINT', 'ERODE', 'SUBSURFACE')
  
          fluvialLinks = []
  
          for link in self.streamLinks:
              for fluvialTypeKeyword in fluvialTypeKeywords:
                  if fluvialTypeKeyword in link.type:
                      fluvialLinks.append(link)
                      break
  
          return fluvialLinks
docs: Retrieve only the links that represent fluvial portions of the stream. Returns a list of StreamLink instances.
  
          Returns:
              list: A list of fluvial :class:`.StreamLink` objects.