+ class "green"
+ [ { "multiple relocation" * } {
+ [ { "" * } {
+ [ "trace" "trace_at ( @⦃?,?⦄ ≡ ? )" "trace_after ( ? ⊚ ? ≡ ? )" "trace_sor ( ? ⋓ ? ≡ ? )" * ]
+ [ "mr2" "mr2_at ( @⦃?,?⦄ ≡ ? )" "mr2_plus ( ? + ? )" "mr2_minus ( ? ▭ ? ≡ ? )" * ]
+ }
+ ]
+ }
+ ]