Best way to explore AST to search for specific patterns? about ast HOT 3 OPEN

anno.arguments.find { argument ->
  argument.identifier.identifierName() == "topics"
}

0 = {DefaultAstTerminal@4161} DefaultAstTerminal(description=LSQUARE, text=[, channel=AstChannel(id=0, name=DEFAULT_TOKEN_CHANNEL), attachments=AstAttachments(attachments={kotlinx.ast.common.ast.AstAttachmentAstInfo@4944de48=   65 [203..204]   [5:18..5:19]}))
1 = {DefaultAstNode@4162} DefaultAstNode(description=expression, children=[DefaultAstNode(description=disjunction, children=[DefaultAstNode(description=conjunction, children=[DefaultAstNode(description=equality, children=[DefaultAstNode(description=comparison, children=[DefaultAstNode(description=genericCallLikeComparison, children=[DefaultAstNode(description=infixOperation, children=[DefaultAstNode(description=elvisExpression, children=[DefaultAstNode(description=infixFunctionCall, children=[DefaultAstNode(description=rangeExpression, children=[DefaultAstNode(description=additiveExpression, children=[DefaultAstNode(description=multiplicativeExpression, children=[DefaultAstNode(description=asExpression, children=[DefaultAstNode(description=prefixUnaryExpression, children=[DefaultAstNode(description=postfixUnaryExpression, children=[DefaultAstNode(description=primaryExpression, children=[DefaultAstNode(description=stringLiteral, children=[DefaultAstNode(description=lineStringLiteral, children=[DefaultAstTerminal
2 = {DefaultAstTerminal@4163} DefaultAstTerminal(description=COMMA, text=,, channel=AstChannel(id=0, name=DEFAULT_TOKEN_CHANNEL), attachments=AstAttachments(attachments={kotlinx.ast.common.ast.AstAttachmentAstInfo@4944de48=   69 [225..226]   [5:40..5:41]}))
3 = {DefaultAstTerminal@4164} DefaultAstTerminal(description=Inside_WS, text= , channel=AstChannel(id=1, name=HIDDEN), attachments=AstAttachments(attachments={kotlinx.ast.common.ast.AstAttachmentAstInfo@4944de48=   70 [226..227]   [5:41..5:42]}))
4 = {DefaultAstNode@4165} DefaultAstNode(description=expression, children=[DefaultAstNode(description=disjunction, children=[DefaultAstNode(description=conjunction, children=[DefaultAstNode(description=equality, children=[DefaultAstNode(description=comparison, children=[DefaultAstNode(description=genericCallLikeComparison, children=[DefaultAstNode(description=infixOperation, children=[DefaultAstNode(description=elvisExpression, children=[DefaultAstNode(description=infixFunctionCall, children=[DefaultAstNode(description=rangeExpression, children=[DefaultAstNode(description=additiveExpression, children=[DefaultAstNode(description=multiplicativeExpression, children=[DefaultAstNode(description=asExpression, children=[DefaultAstNode(description=prefixUnaryExpression, children=[DefaultAstNode(description=postfixUnaryExpression, children=[DefaultAstNode(description=primaryExpression, children=[DefaultAstNode(description=stringLiteral, children=[DefaultAstNode(description=lineStringLiteral, children=[DefaultAstTerminal
5 = {DefaultAstTerminal@4166} DefaultAstTerminal(description=RSQUARE, text=], channel=AstChannel(id=0, name=DEFAULT_TOKEN_CHANNEL), attachments=AstAttachments(attachments={kotlinx.ast.common.ast.AstAttachmentAstInfo@4944de48=   77 [268..269]   [5:83..5:84]}))

   // this call will add a new defintion to the TreeMapper
    .convert(
        // filter byDescription will select all AST Nodes (and also terminal symbols) with the given description
        filter = byDescription("annotation")
   // select only AstNodes (a node with possible child nodes), no AstTerminal (a leaf node containing text)
    ) { node: AstNode ->
        // use the same TreeMapper to convert all children of this node
        recursiveFlatten(node).flatMap { result ->
            // continue the tree mapping,
            astContinue(
                // replace the node `node` with this KlassAnnotation
                KlassAnnotation(
                    // result the summary of all children nodes,
                    // filter out all KlassIdentifer
                    identifier = result.filterIsInstance<KlassIdentifier>(),
                    // ...and all KlassDeclarations
                    arguments = result.filterIsInstance<KlassDeclaration>()
                )
            )
        }
    }