text: Title: GraphSAGE sampling operation
  Body: ### 📚 Describe the documentation issue
  
  Hello, I recently tried adding some nodes to a graph to observe changes in the original nodes, such as from A to B, where A is the inserted node. I want to see the changes in B, but I found that using GraphSAGE, the output of node B does not change. I also couldn't find the controls for the sampling operation in GraphSAGE. Could you explain which part controls the node sampling operation in GraphSAGE?
  
  ### Suggest a potential alternative/fix
  
  _No response_