code: private Action extractDocumentationAnnotations(
  			ExtDirectMethodDocumentation documentation) {
  		if (!documentation.value().isEmpty()) {
  			ActionDoc actionDoc = new ActionDoc(getAction(), documentation.value(),
  					documentation.author(), documentation.version(),
  					documentation.deprecated());
  			ExtDirectDocParameters docParameters = documentation.parameters();
  			if (null != docParameters) {
  				String[] params = docParameters.params();
  				String[] descriptions = docParameters.descriptions() == null
  						? new String[params.length]
  						: docParameters.descriptions();
  				if (params.length == descriptions.length) {
  					for (int i = 0; i < params.length; i++) {
  						actionDoc.getParameters().put(params[i],
  								descriptions[i] == null ? "No description"
  										: descriptions[i]);
  					}
  				}
  				else {
  					LogFactory.getLog(MethodInfo.class).info(
  							"Documentation: skip generation of parameters, params size is different from descriptions size");
  				}
  			}
  			ExtDirectDocReturn docReturn = documentation.returnMethod();
  			if (null != docReturn) {
  				String[] properties = docReturn.properties();
  				String[] descriptions = docReturn.descriptions() == null
  						? new String[properties.length]
  						: docReturn.descriptions();
  				if (properties.length == descriptions.length) {
  					for (int i = 0; i < properties.length; i++) {
  						actionDoc.getReturnMethod().put(properties[i],
  								descriptions[i] == null ? "No description"
  										: descriptions[i]);
  					}
  				}
  				else {
  					LogFactory.getLog(MethodInfo.class).info(
  							"Documentation: skip generation of return method properties, properties size is different from descriptions size");
  				}
  			}
  			return actionDoc;
  		}
  		return this.action;
  	}
docs: The rule is: whatever has been given is taken as is the API documentation is non
  critical, so any discrepancies will be silently ignored
  
  @param documentation
  @return ActionDoc