print method for an objects of class c("retlev", "lax").
Arguments
- x
- an object of class - c("retlev", "lax"), a result of a call to- return_level.
- digits
- The argument - digitsto- print.default.
- ...
- Additional arguments. None are used in this function. 
Value
The argument x, invisibly, as for all
  print methods.
Details
Prints the call to return_level and the estimates
  and 100x$level% confidence limits for the x$m-year
  return level.
Examples
See the examples in return_level.