/**
 * Option model interface
 * @author Islam Attrash
 */
export interface IOption {
    /**
     * Text for the option
     */
    text: string;
    /**
     * The option value
     */
    value: any;
    /**
     * Any other OPTIONAL dynamic user properties
     */
    [key: string]: any;
}

/**
 * Option model interface
 * @author Islam Attrash
 */
export interface IOption {
    /**
     * Text for the option
     */
    text: string;
    /**
     * The option value
     */
    value: any;
    //Any other dynamic user selection
    [key: string]: any;
}

--- 
+++ 
@@ -11,6 +11,8 @@
      * The option value
      */
     value: any;
-    //Any other dynamic user selection
+    /**
+     * Any other OPTIONAL dynamic user properties
+     */
     [key: string]: any;
 }
Correct string for the IOption interface
