Has anyone been able to create caladdminutes function? Been searching in availab

I think this can be achieved by instead of providing the decimal value as input for caladdhours, can we add the minutes to date and time variable we are passing as first input.
For example i need to know next business hour after 90 minutes from now then
instead of caladdhours(now(),1.5,calendar) (as it will round off the dcimal to integer value)
we can pass caladdhours(now()+intervalds(0,30,0),1,calendar).

I think this can be achieved by instead of providing the decimal value as input for caladdhours, can we add the minutes to date and time variable we are passing as first input.
For example i need to know next business hour after 90 minutes from now then
instead of caladdhours(now(),1.5,calendar) (as it will round off the dcimal to integer value)
we can pass caladdhours(now()+intervalds(0,30,0),1,calendar).