docstr: Note:
      Set `reverse` to True for inference.
  
  Shapes:
      - x: :math:`[B, C, T]`
      - x_mask: :math:`[B, 1, T]`
      - g: :math:`[B, C, 1]`
docstr_tok: ["Note",":","Set","`","reverse","`","to","True","for","inference",".","Shapes",":","-","x",":",":","math",":","`","[","B",",","C",",","T","]","`","-","x_mask",":",":","math",":","`","[","B",",","1",",","T","]","`","-","g",":",":","math",":","`","[","B",",","C",",","1","]","`"]
code: def forward(self, x, x_mask, g=None, reverse=False):
      """
      Note:
          Set `reverse` to True for inference.
  
      Shapes:
          - x: :math:`[B, C, T]`
          - x_mask: :math:`[B, 1, T]`
          - g: :math:`[B, C, 1]`
      """
      if not reverse:
          for flow in self.flows:
              x, _ = flow(x, x_mask, g=g, reverse=reverse)
              x = torch.flip(x, [1])
      else:
          for flow in reversed(self.flows):
              x = torch.flip(x, [1])
              x = flow(x, x_mask, g=g, reverse=reverse)
      return x
  
imports: import math
  import torch
  from torch import nn
  from TTS.tts.layers.glow_tts.glow import WN
  from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
  from TTS.tts.utils.helpers import sequence_mask
label_desc: Use image node_id 2 for calling the ResidualCouplingBlocks obj's underlying member method code with example usage: obj.forward(x, x_mask, g, reverse) and returns: x