code: public static CrsTo createCrsTo(String crsName) {
          String nameToUse = crsName == null ? "EPSG:4326" : crsName;
          CrsTo result = new CrsTo();
          NamedCrsPropertyTo property = new NamedCrsPropertyTo();
          property.setName(nameToUse);
          result.setProperties(property);
          return result;
      }
docs: Convenience method to create a named crs to.
  
  @param crsName the name of the crs to use, if null, the default crs for geojson is used.
  @return the transfer object that corresponds with the default Crs. According to the GeoJson spec
  The default CRS is a geographic coordinate reference system, using the WGS84 datum, and with longitude
  and latitude units of decimal degrees.