from torch import nn


def convert_to_buffer(module: nn.Module, persistent: bool = True):
    # Recurse over child modules.
    for name, child in list(module.named_children()):
        convert_to_buffer(child, persistent)

    # Also re-save buffers to change persistence.
    for name, parameter_or_buffer in (
        *module.named_parameters(recurse=False),
        *module.named_buffers(recurse=False),
    ):
        value = parameter_or_buffer.detach().clone()
        delattr(module, name)
        module.register_buffer(name, value, persistent=persistent)