How to use the @ngrx/store-devtools/schematics-core/utility/strings.camelize function in @ngrx/store-devtools

function addReducerToStateInterface(source, reducersPath, options) {
        const stateInterface = source.statements.find(stm => stm.kind === ts.SyntaxKind.InterfaceDeclaration);
        let node = stateInterface;
        if (!node) {
            return new change_1.NoopChange();
        }
        const state = options.plural
            ? stringUtils.pluralize(options.name)
            : stringUtils.camelize(options.name);
        const keyInsert = state + ': from' + stringUtils.classify(options.name) + '.State;';
        const expr = node;
        let position;
        let toInsert;
        if (expr.members.length === 0) {
            position = expr.getEnd() - 1;
            toInsert = `  ${keyInsert}\n`;
        }
        else {
            node = expr.members[expr.members.length - 1];
            position = node.getEnd() + 1;
            // Get the indentation of the last element, if any.
            const text = node.getFullText(source);
            const matches = text.match(/^\r?\n+(\s*)/);
            if (matches.length > 0) {
                toInsert = `${matches[1]}${keyInsert}\n`;