public static <T> T convertValue(Object o, Class<T> clazz) {
    return o == null ? null : MAPPERS.get().convertValue(o, clazz);
  }
Utilities for converting between JSON strings and java objects using Jackson utilities.
<p>
{@link ObjectMapper} are expensive to construct, but not thread safe, so this class reuses the same object mapper
within each thread but does not share between threads.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/JsonConversion.java