public Optional<Collector<?, ?, ?>> findFor(Type containerType) {
        return findFactoryFor(containerType)
                .map(f -> f.build(containerType));
    }
Obtain a collector for the given type.

@param containerType the container type.
@return a Collector for the given container type, or empty null if no collector is registered for the given type.
core/src/main/java/org/jdbi/v3/core/collector/JdbiCollectors.java