How to use the @ngrx/store-devtools/schematics-core/utility/ast-utils.findNodes function in @ngrx/store-devtools

relevantImports.forEach(function (n) {
                Array.prototype.push.apply(imports_1, ast_utils_1.findNodes(n, ts.SyntaxKind.Identifier));
                if (ast_utils_1.findNodes(n, ts.SyntaxKind.AsteriskToken).length > 0) {
                    importsAsterisk_1 = true;
                }
            });
            // if imports * from fileName, don't add symbolName

function insertImport(source, fileToEdit, symbolName, fileName, isDefault) {
        if (isDefault === void 0) { isDefault = false; }
        var rootNode = source;
        var allImports = ast_utils_1.findNodes(rootNode, ts.SyntaxKind.ImportDeclaration);
        // get nodes that map to import statements from the file fileName
        var relevantImports = allImports.filter(function (node) {
            // StringLiteral of the ImportDeclaration is the import file (fileName in this case).
            var importFiles = node
                .getChildren()
                .filter(function (child) { return child.kind === ts.SyntaxKind.StringLiteral; })
                .map(function (n) { return n.text; });
            return importFiles.filter(function (file) { return file === fileName; }).length === 1;
        });
        if (relevantImports.length > 0) {
            var importsAsterisk_1 = false;
            // imports from import file
            var imports_1 = [];
            relevantImports.forEach(function (n) {
                Array.prototype.push.apply(imports_1, ast_utils_1.findNodes(n, ts.SyntaxKind.Identifier));
                if (ast_utils_1.findNodes(n, ts.SyntaxKind.AsteriskToken).length > 0) {

relevantImports.forEach(function (n) {
                Array.prototype.push.apply(imports_1, ast_utils_1.findNodes(n, ts.SyntaxKind.Identifier));
                if (ast_utils_1.findNodes(n, ts.SyntaxKind.AsteriskToken).length > 0) {
                    importsAsterisk_1 = true;
                }
            });
            // if imports * from fileName, don't add symbolName

var imports_1 = [];
            relevantImports.forEach(function (n) {
                Array.prototype.push.apply(imports_1, ast_utils_1.findNodes(n, ts.SyntaxKind.Identifier));
                if (ast_utils_1.findNodes(n, ts.SyntaxKind.AsteriskToken).length > 0) {
                    importsAsterisk_1 = true;
                }
            });
            // if imports * from fileName, don't add symbolName
            if (importsAsterisk_1) {
                return new change_1.NoopChange();
            }
            var importTextNodes = imports_1.filter(function (n) { return n.text === symbolName; });
            // insert import if it's not there
            if (importTextNodes.length === 0) {
                var fallbackPos_1 = ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.CloseBraceToken)[0].getStart() ||
                    ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.FromKeyword)[0].getStart();
                return ast_utils_1.insertAfterLastOccurrence(imports_1, ", " + symbolName, fileToEdit, fallbackPos_1);
            }
            return new change_1.NoopChange();
        }
        // no such import declaration exists
        var useStrict = ast_utils_1.findNodes(rootNode, ts.SyntaxKind.StringLiteral).filter(function (n) { return n.getText() === 'use strict'; });
        var fallbackPos = 0;
        if (useStrict.length > 0) {
            fallbackPos = useStrict[0].end;
        }
        var open = isDefault ? '' : '{ ';
        var close = isDefault ? '' : ' }';
        // if there are no imports or 'use strict' statement, insert import at beginning of file
        var insertAtBeginning = allImports.length === 0 && useStrict.length === 0;
        var separator = insertAtBeginning ? '' : ';\n';
        var toInsert = separator + "import " + open + symbolName + close +

});
            // if imports * from fileName, don't add symbolName
            if (importsAsterisk_1) {
                return new change_1.NoopChange();
            }
            var importTextNodes = imports_1.filter(function (n) { return n.text === symbolName; });
            // insert import if it's not there
            if (importTextNodes.length === 0) {
                var fallbackPos_1 = ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.CloseBraceToken)[0].getStart() ||
                    ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.FromKeyword)[0].getStart();
                return ast_utils_1.insertAfterLastOccurrence(imports_1, ", " + symbolName, fileToEdit, fallbackPos_1);
            }
            return new change_1.NoopChange();
        }
        // no such import declaration exists
        var useStrict = ast_utils_1.findNodes(rootNode, ts.SyntaxKind.StringLiteral).filter(function (n) { return n.getText() === 'use strict'; });
        var fallbackPos = 0;
        if (useStrict.length > 0) {
            fallbackPos = useStrict[0].end;
        }
        var open = isDefault ? '' : '{ ';
        var close = isDefault ? '' : ' }';
        // if there are no imports or 'use strict' statement, insert import at beginning of file
        var insertAtBeginning = allImports.length === 0 && useStrict.length === 0;
        var separator = insertAtBeginning ? '' : ';\n';
        var toInsert = separator + "import " + open + symbolName + close +
            (" from '" + fileName + "'" + (insertAtBeginning ? ';\n' : ''));
        return ast_utils_1.insertAfterLastOccurrence(allImports, toInsert, fileToEdit, fallbackPos, ts.SyntaxKind.StringLiteral);
    }
    exports.insertImport = insertImport;

// imports from import file
            var imports_1 = [];
            relevantImports.forEach(function (n) {
                Array.prototype.push.apply(imports_1, ast_utils_1.findNodes(n, ts.SyntaxKind.Identifier));
                if (ast_utils_1.findNodes(n, ts.SyntaxKind.AsteriskToken).length > 0) {
                    importsAsterisk_1 = true;
                }
            });
            // if imports * from fileName, don't add symbolName
            if (importsAsterisk_1) {
                return new change_1.NoopChange();
            }
            var importTextNodes = imports_1.filter(function (n) { return n.text === symbolName; });
            // insert import if it's not there
            if (importTextNodes.length === 0) {
                var fallbackPos_1 = ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.CloseBraceToken)[0].getStart() ||
                    ast_utils_1.findNodes(relevantImports[0], ts.SyntaxKind.FromKeyword)[0].getStart();
                return ast_utils_1.insertAfterLastOccurrence(imports_1, ", " + symbolName, fileToEdit, fallbackPos_1);
            }
            return new change_1.NoopChange();
        }
        // no such import declaration exists
        var useStrict = ast_utils_1.findNodes(rootNode, ts.SyntaxKind.StringLiteral).filter(function (n) { return n.getText() === 'use strict'; });
        var fallbackPos = 0;
        if (useStrict.length > 0) {
            fallbackPos = useStrict[0].end;
        }
        var open = isDefault ? '' : '{ ';
        var close = isDefault ? '' : ' }';
        // if there are no imports or 'use strict' statement, insert import at beginning of file
        var insertAtBeginning = allImports.length === 0 && useStrict.length === 0;
        var separator = insertAtBeginning ? '' : ';\n';