def METHOD_NAME(self) -> None:
    """Add the fc branch which consists of a sequential of fc layers."""
    branch_fcs = ModuleList()
    for i in range(self.num_fcs):
        fc_in_channels = (
            self.in_channels *
            self.roi_feat_area if i == 0 else self.fc_out_channels)
        branch_fcs.append(nn.Linear(fc_in_channels, self.fc_out_channels))
    return branch_fcs