<filename>tests/resources/config_modifier.py
from hamilton.function_modifiers import config


def new_param() -> str:
    return 'dummy'


@config.when(fn_1_version=0)
def fn() -> str:
    pass


@config.when(fn_1_version=1)
def fn__v1() -> str:
    return 'version_1'


@config.when(fn_1_version=2)
def fn__v2(new_param: str) -> str:
    return 'version_2'


@config.when(fn_1_version=3, name='fn')
def fn_to_rename() -> str:
    return 'version_3'

<filename>tests/resources/config_modifier.py
from hamilton.function_modifiers import config


def new_param() -> str:
    return 'dummy'


@config.when(fn_1_version=0)
def fn() -> str:
    pass


@config.when(fn_1_version=1)
def fn__v1() -> str:
    return 'version_1'


@config.when(fn_1_version=2)
def fn__v2(new_param: str) -> str:
    return 'version_2'


@config.when(fn_1_version=3, name='fn')
def fn_to_rename() -> str:
    return 'version_3'
