class_docstr: Build NN graph
class_docstr_tok: ["Build","NN","graph"]
code: def __init__(self, n_neighbor):
      super(KNNGraphBuilder, self).__init__()
      self.n_neighbor = n_neighbor
      self.knn = KNearNeighbors(n_neighbor)
  
imports: import dgl
  import torch
  import torch.nn
  import torch.nn.functional
  from dgl.geometry import farthest_point_sampler
label_desc: Use image node_id 1 to create a new KNNGraphBuilder object from inherited base classes: nn with example: obj = KNNGraphBuilder(n_neighbor)