/// <summary>
	/// Exit a parse tree produced by <see cref="UserAgentTreeWalkerParser.matcherExtract"/>.
	/// <para>The default implementation does nothing.</para>
	/// </summary>
	/// <param name="context">The parse tree.</param>
	public virtual void ExitMatcherExtract([NotNull] UserAgentTreeWalkerParser.MatcherExtractContext context) { }
 /// <summary>
 /// Visit a parse tree produced by <see cref="UserAgentTreeWalkerParser.matcherExtract"/>.
 /// <para>
 /// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
 /// on <paramref name="context"/>.
 /// </para>
 /// </summary>
 /// <param name="context">The parse tree.</param>
 /// <return>The visitor result.</return>
 public virtual Result VisitMatcherExtract([NotNull] UserAgentTreeWalkerParser.MatcherExtractContext context)
 {
     return(VisitChildren(context));
 }