Mark functions that should only be used internally.

JSResolverHelper slots and INVOKABLEs are exported to JavaScript but not
all functions shall be used a resolver. Some of the exported functions
are only meant to be used by Wrappers in tomahawk.js as they cannot
fulfil their task completely in JS and need to callback to Qt for
certain functionality.

src/libtomahawk/resolvers/JSResolverHelper.h

@@ -43,6 +43,10 @@ Q_OBJECT
 
 public:
     JSResolverHelper( const QString& scriptPath, JSResolver* parent );
+
+    /**
+     * INTERNAL USE ONLY!
+     */
     void setResolverConfig( const QVariantMap& config );
 
     /**
@@ -67,6 +71,8 @@ public:
      *     Tomahawk.retrievedMetadata(metadataId, metadata, error)
      * on completion. This method is an internal variant, JavaScript resolvers
      * are advised to use Tomahawk.retrieveMetadata(url, options, callback).
+     *
+     * INTERNAL USE ONLY!
      */
     Q_INVOKABLE void nativeRetrieveMetadata( int metadataId, const QString& url,
                                              const QString& mimetype,
@@ -81,6 +87,8 @@ public:
      * Use cases are:
      *  * Referer header: Stripped on MacOS and the specification says it
      *    should be stripped
+     *
+     * INTERNAL USE ONLY!
      */
     Q_INVOKABLE void nativeAsyncRequest( int requestId, const QString& url,
                                          const QVariantMap& headers,
@@ -97,6 +105,9 @@ public:
     Q_INVOKABLE QVariantList resolveFromFuzzyIndex( const QString& artist, const QString& album, const QString& tracks );
     Q_INVOKABLE void deleteFuzzyIndex();
 
+    /**
+     * INTERNAL USE ONLY!
+     */
     void customIODeviceFactory( const Tomahawk::result_ptr&, const QString& url,
                                 boost::function< void( const QString&, QSharedPointer< QIODevice >& ) > callback ); // async