Checks if settings are a valid object of class settings
.
is.settings(x, dfl = NULL, return.logical = FALSE)
A logical value or nothing, depending on the value of return.logical
.
settings object
list of data frames, returned by function settings_to_df
If return.logical = FALSE
(default), an error
message is printed if the object is not of class settings
, if
return.logical = TRUE
, a logical value is returned