While debugging a function, call boom_on() and all subsequent calls will be boomed,
call boom_off() to return to standard debugging.
boom_on(clock = NULL, print = NULL)
boom_off()whether to time intermediate steps. Defaults to getOption("boomer.clock")
evaluated at run time (FALSE unless you change it). The execution time of
a step doesn't include the execution time of its previously printed sub-steps.
A function, a formula or a list of functions or formulas, used to
modify the way the output is printed. Defaults to getOption("boomer.print")
evaluated at run time (base::print unless you change it)'.
Returns NULL invisibly, called for side effects.