code: public NumberField buildRMST(Message.MenuIdentifier targetMenu, CdjStatus.TrackSourceSlot slot) {
          return buildRMST(posingAsPlayer, targetMenu, slot, CdjStatus.TrackType.REKORDBOX);
      }
docs: <p>Build the <em>R:M:S:T</em> parameter that begins many queries.</p>
  
  <p>Many request messages take, as their first argument, a 4-byte value where each byte has a special meaning.
  The first byte is the player number of the requesting player. The second identifies the menu into which
  the response is being loaded, as described by {@link Message.MenuIdentifier}. The third specifies the media
  slot from which information is desired, as described by {@link CdjStatus.TrackSourceSlot}, and the fourth
  byte identifies the type of track about which information is being requested; in most requests this has the
  value 1, which corresponds to rekordbox tracks, and this version of the function assumes that.</p>
  
  @param targetMenu the destination for the response to this query
  @param slot the media library of interest for this query
  
  @return the first argument to send with the query in order to obtain the desired information