def to_camel_case(string: str) -> str:
    """
    Converts a ``snake_case`` string to ``camelCase``.
    :param string: A ``snake_case`` string.
    :return: A ``camelCase`` version of the input.
    """
    components = string.split("_")
    return components[0] + "".join(x.capitalize() for x in components[1:])