survival vector on life?

[alecloudenback]

life = SingleLife(                 # The life underlying the risk
    mort = vbt2001.select[age],    # -- Mortality rates
    issue_age = 30                 # -- Issue Age
)

yield = Yields.Constant(0.05)      # Using a flat 5% interest rate

lc = LifeContingency(life, yield)  # LifeContingency joins the risk with interest


ins = Insurance(lc)                # Whole Life insurance

Any reason to not extend survival() to work on life? Currently only has method for ins. Similar for other functions, e.g. survival(life,30,35)