code: public static HppRequest fromJsonHppRequest(String json) {
  		try {
  			return hppRequestReader.readValue(json);
  		} catch (Exception ex) {
  			LOGGER.error("Error creating HppRequest from JSON.", ex);
  			throw new RealexException("Error creating HppRequest from JSON.", ex);
  		}
  	}
docs: Method deserialises JSON to <code>HppRequest</code>.
  
  @param json
  @return HppRequest