public Map<String, Resource> getHTMLResources() {
        return htmlResources;
    }
Returns a map of all declared HTML patch resources associated with this
extension, where the key of each entry in the map is the path to that
resource within the extension .jar. HTML patch resources are declared
within the extension manifest.

@return
    All declared HTML patch resources associated with this extension.
guacamole/src/main/java/org/apache/guacamole/extension/Extension.java