code: def forward(self, x):
      if self.mean is not None:
          x -= self.mean
      return torch.mm(x, self.transform_matrix).float()
  
file_path: hummingbird/hummingbird/ml/operator_converters/_decomposition_implementations.py
imports: import torch
  from ._physical_operator import PhysicalOperator
label_desc: Use image node_id 2 for calling the Decomposition obj's underlying member method code with example usage: obj.forward(x) and returns: torch