public String getGuacamoleVersion() {
        return guacamoleVersion;
    }
Returns the version of the Guacamole web application for which the
extension was built, such as "0.9.7".

@return
    The version of the Guacamole web application for which the extension
    was built.
guacamole/src/main/java/org/apache/guacamole/extension/ExtensionManifest.java