code: public boolean addProperty(String propertyName) {
  
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(propertyName)) {
              if (LOG.isDebugEnabled()) {
                  LOG.debug(Messages.get().getBundle().key(Messages.LOG_ADD_PROP_1, propertyName));
              }
              return m_properties.add(propertyName);
          } else {
              return false;
          }
      }
docs: Adds a property definition name to the list of editable properties.<p>
  
  @param propertyName the name of the property definition to add
  @return true if the property definition was added properly