Get names of available data used in expressions. This is used to find data
for use with [non-standard evaluation](http://adv-r.had.co.nz/Computing-on-the-language.html) (NSE) in
functions like [filter_taxa()]. Expressions are not evaluated and do not need
to make sense.
obj$names_used(...)
Value
Named `character`
Arguments
obj
a [taxonomy()] or [taxmap()] object
...
One or more expressions
See Also
Other NSE helpers:
all_names(),
data_used,
get_data()