public FeatureCollector.Feature setSimplifyMethod(SimplifyMethod strategy) {
      defaultSimplifyMethod = strategy;
      return this;
    }
Sets the fallback line and polygon simplify method when not overriden by *
{@link #setSimplifyMethodOverrides(ZoomFunction)}.
planetiler-core/src/main/java/com/onthegomap/planetiler/FeatureCollector.java