class_docstr: Ball Query - Find the neighbors with-in a fixed radius
class_docstr_tok: ["Ball","Query","-","Find","the","neighbors","with-in","a","fixed","radius"]
code: def __init__(self, radius, n_neighbor):
      super(FixedRadiusNearNeighbors, self).__init__()
      self.radius = radius
      self.n_neighbor = n_neighbor
  
imports: import dgl
  import dgl.function
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from dgl.geometry import farthest_point_sampler
  from torch.autograd import Variable
label_desc: Use image node_id 1 to create a new FixedRadiusNearNeighbors object from inherited base classes: nn with example: obj = FixedRadiusNearNeighbors(radius, n_neighbor)