See https://github.com/killbill/killbill-plugin-framework-java/blob/c0f16f82213462b083a88c8183bba72a7a34fda4/src/main/java/org/killbill/billing/catalog/api/boilerplate/UsageImp.java#L310 Consider both `public T withTiers(final Tier[] tiers)` and `public T withTiers(final List<Tier> tiers)`.
See
killbill-plugin-framework-java/src/main/java/org/killbill/billing/catalog/api/boilerplate/UsageImp.java
Line 310 in c0f16f8
Consider both
public T withTiers(final Tier[] tiers)andpublic T withTiers(final List<Tier> tiers).