def get_all_fix_names(fixer_pkg, remove_prefix=True):
    pkg = __import__(fixer_pkg, [], [], ["*"])
    fixer_dir = os.path.dirname(pkg.__file__)
    fix_names = []
    for name in sorted(os.listdir(fixer_dir)):
        if name.startswith("fix_") and name.endswith(".py"):
            if remove_prefix:
                name = name[4:]
            fix_names.append(name[:-3])
    return fix_names