parameters: (cls, pre=False)
return_statement: return None, None
docstring: Peek into the navigation cache
          @param cls: Class
          @keyword pre: bool
docstring_summary: Peek into the navigation cache
          @param cls: Class
          @keyword pre: bool
docstring_tokens: Peek into the navigation cache @param cls : Class @keyword pre : bool
function: def PeekNavi(cls, pre=False):
          """Peek into the navigation cache
          @param cls: Class
          @keyword pre: bool
  
          """
          if pre:
              if cls._poscache.HasPrevious():
                  return cls._poscache.PeekPrevious()
          else:
              if cls._poscache.HasNext():
                  return cls._poscache.PeekNext()
          return None, None
function_tokens: def PeekNavi ( cls , pre = False ) : if pre : if cls . _poscache . HasPrevious ( ) : return cls . _poscache . PeekPrevious ( ) else : if cls . _poscache . HasNext ( ) : return cls . _poscache . PeekNext ( ) return None , None