code: private void writeCRS(JsonGenerator jsonGenerator, String[] authorityAndSRID) throws IOException {
          if (authorityAndSRID[1] != null) {
              jsonGenerator.writeObjectFieldStart("crs");
              jsonGenerator.writeStringField("type", "name");
              jsonGenerator.writeObjectFieldStart("properties");
              StringBuilder sb = new StringBuilder("urn:ogc:def:crs:");
              sb.append(authorityAndSRID[0]).append("::").append(authorityAndSRID[1]);
              jsonGenerator.writeStringField("name", sb.toString());
              jsonGenerator.writeEndObject();
              jsonGenerator.writeEndObject();
          }
      }
docs: Write the CRS in the geojson
  
  @param jsonGenerator
  @param authorityAndSRID
  @throws IOException