code: async def getNodeByNdef(self, ndef):
          '''
          Return a single Node by (form,valu) tuple.
  
          Args:
              ndef ((str,obj)): A (form,valu) ndef tuple.  valu must be
              normalized.
  
          Returns:
              (synapse.lib.node.Node): The Node or None.
          '''
          buid = s_common.buid(ndef)
          return await self.getNodeByBuid(buidync def getNodeByNdef(self, ndef):
          '''
          Return a single Node by (form,valu) tuple.
  
          Args:
              ndef ((str,obj)): A (form,valu) ndef tuple.  valu must be
              normalized.
  
          Returns:
              (synapse.lib.node.Node): The Node or None.
          '''
          buid = s_common.buid(ndef)
          return await self.getNodeByBuid(buid)
docs: Return a single Node by (form,valu) tuple.
  
          Args:
              ndef ((str,obj)): A (form,valu) ndef tuple.  valu must be
              normalized.
  
          Returns:
              (synapse.lib.node.Node): The Node or None.