@deco1(dval1)
@deco2(dval2)
@deco3(
    dval3,
    dval4
)
async def func2(
    arg1: int = 3,
    arg2: Class1 = val1,
    arg3: Class2 = func3(val2),
    arg4: int = 4,
    arg5: int = 5
) -> Ret1:
    pass

def example():
    """Valid function definition with docstring only."""