code: public static <T> T from(final long pointer) {
          if (pointer == 0L) {
              return null;
          }
          return (T) MAPPED_OBJECTS.get(pointer);
      }
docs: Retrieve a POJO that is mapped to a native pointer. This method should be used to easily retrieve a POJO with a
  native context. This method will only return a POJO if it was previously cached with a call to {@link #store(long, Object)}
  
  @param pointer The pointer of the associated object.
  @param <T>     The type of the POJO to cast.
  
  @return The cached object.