{both-left (strings/trim <both left> abc)
 both-right (strings/trim <both right> abc)
 conflicting-sides (strings/trim <left right> abc)
 extra (strings/trim <both> a abc extra)
 missing (strings/trim)
 missing-side (strings/trim {} abc)
 old-arity (strings/trim abc)
 opts-list (strings/trim [both] abc)
 opts-null (strings/trim null abc)
 opts-string (strings/trim both abc)
 repeat-only (strings/trim <repeat> abc)
 source-null (strings/trim <both> null)
 source-number (strings/trim <left> 1)
 text-null (strings/trim <left> null abc)
 text-number (strings/trim <right> 1 abc)
 text-options (strings/trim <all both> a abc)
 text-opts-null (strings/trim null a abc)
 text-source-null (strings/trim <right> a null)
 text-source-number (strings/trim <both repeat> a 1)
 unknown-option (strings/trim <all both> abc)}