code: public Builder setDefaultTTL(@Nullable final Duration ttl) {
              if (ttl == null) {
                  return this;
              }
  
              return setDefaultTTL((int) ttl.getSeconds());
          }
docs: The default Time To Live (TTL) for items in {@link EVCache} in
  seconds. You can override the value by passing the desired TTL with
  {@link EVCache#set(String, Object, int)} operations.
  
  @param ttl. Default is 900 seconds.
  @return this {@code Builder} object