tracemem()
c()
NULL
[[
$
@
slot()
switch()
...
<<-
map()
modify()
map2()
walk()
pmap()
ggsave()
purrr::safely()
memoise::memoise()
NextMethod()
!!
exec()
dots_list()
lobstr::ast()
local()
source()
function()
subset()
select()
substitute()
match.call()
to_math
browser()
dump.frames()
bench::mark()
mean()
as.data.frame()