code: public static String getProperty(Object bean, String field) {
          Object property = PropertyUtils.getProperty(bean, field);
          if (property == null) {
              return "null";
          }
  
          return property.toString();
      }
docs: Get bean's property value and maps to String
  
  @see io.katharsis.core.internal.utils.PropertyUtils#getProperty(Object, String)
  
  @param bean  bean to be accessed
  @param field bean's field
  @return bean's property value