Assert that an object is a list.
assertList(
x,
length = NULL,
na = FALSE,
null = FALSE,
unique = FALSE,
named = FALSE,
class = NULL,
call = parent.frame(),
msg = NULL
)
Variable to check.
Required length. If NULL
length is not checked.
Whether it can contain NA values.
Whether it can be NULL.
Whether it has to contain unique elements.
Whether it has to be named.
Class that the elements must have.
Call argument that will be passed to cli
error message.
Custom error message.