TurfMeasurement#length method cannot handle empty lists

The other day, I encountered what I regard as an issue in the following Code snippet: https://github.com/mapbox/mapbox-java/blob/4ae8b78746fb37b2673364bdd4c8702057f3e7f3/services-turf/src/main/java/com/mapbox/turf/TurfMeasurement.java#L227
The scenario is the following: We have a list of GPS points of which some or all are invalid which is denoted by the coordinates being (0 , 0) - which IS bad Design, but our Team cannot change this... 🙄. Thus, we filter out those points before passing it to the length method. We just encountered an IndexOutOfBoundsException when the list is empty because there is no length check on the list. I guess the fix here is relatively easy, but the question ist - what should be returned in this case. We built in a check before hand returning 0 in this particular case. Maybe even a checked exception might be a feasible idea.

services-turf/src/main/java/com/mapbox/turf/TurfMeasurement.java のリンク先の length メソッド付近から始め、空のリストで発生する失敗を再現します。メソッドが通常のポイントリストをどのように処理するかを確認し、空の入力に対して意図されている契約を明らかにするため、近くの使用箇所を確認します。動作について合意され、空のリストの場合に予期せず例外がスローされなくなり、回帰テストによるカバレッジでそれが検証されれば完了です。