I want to add a conditional, and test if a variable present any of 2 classes:

test if db present any of 2 class:

example 1

  if(!inherits(db, ("bioData", "character") ) ){
        cat("nt Error:n")
        cat("t database must be bioData or character class n")
        stop()
    }

example 2, the next example works, but is it valid ???

 if(!class(db)[1] %in% c("bioData", "character") ){
        cat("nt Error:n")
        cat("t database must be bioData or character class n")
        stop()
    }

Any suggestion ??!!

Thanks !!