Checks if link type config option has a valid value.

    Args:
        types (list/string): type(s) of links that dvc should try out.

def supported_cache_type(types):
    """Checks if link type config option has a valid value.

    Args:
        types (list/string): type(s) of links that dvc should try out.
    """
    if isinstance(types, str):
        types = [typ.strip() for typ in types.split(",")]
    for typ in types:
        if typ not in ["reflink", "hardlink", "symlink", "copy"]:
            return False
    return True