class_docstr: A general GNN layer.
class_docstr_tok: ["A","general","GNN","layer","."]
code: def update(self, aggr_out):
      if self.bias is not None:
          aggr_out = aggr_out + self.bias
      return aggr_out
  
imports: import torch
  from torch.nn import Parameter
  from torch_geometric.graphgym.config import cfg
  from torch_geometric.nn.conv import MessagePassing
  from torch_geometric.nn.inits import glorot, zeros
  from torch_geometric.utils import add_remaining_self_loops, scatter
label_desc: Use image node_id 6 for calling the GeneralConvLayer obj's underlying member method code with example usage: obj.update(aggr_out) and returns: aggr_out