code: def change_input_channels(
      self, input_channels: int, mode="auto", **kwargs
  ):
      self.encoder.stem_conv1 = make_n_channel_input_std_conv(
          self.encoder.stem_conv1, input_channels, mode, **kwargs
      )
      return self
  
imports: from .common import GenericTimmEncoder, make_n_channel_input_std_conv
label_desc: Use image node_id 2 for calling the NFNetF2Encoder obj's underlying member method code with example usage: obj.change_input_channels(input_channels, mode) and returns: self