function executeCommand(eventName) {
        // Temporary fix for #2616 - don't execute the command if a modal dialog is open.
        // This should really be fixed with proper menu enabling.
        if ($(".modal.instance").length || !appReady) {
            // Another hack to fix issue #3219 so that all test windows are closed
            // as before the fix for #3152 has been introduced. isBracketsTestWindow
            // property is explicitly set in createTestWindowAndRun() in SpecRunnerUtils.js.
            if (window.isBracketsTestWindow) {
                return false;
            }
            // Return false for all commands except file.close_window command for
            // which we have to return true (issue #3152).
            return (eventName === Commands.FILE_CLOSE_WINDOW);
        }

        // Use E for Error so that uglify doesn't change this to simply Error()
        var promise, E = Error, e = new E(), stackDepth = e.stack.split("\n").length;

        // This function should *only* be called as a top-level function. If the current
        // stack depth is > 2, it is most likely because we are at a breakpoint.
        if (stackDepth < 3) {
            promise = CommandManager.execute(eventName);
        } else {
            console.error("Skipping command " + eventName + " because it looks like you are " +
                          "at a breakpoint. If you are NOT at a breakpoint, please " +
                          "file a bug and mention this comment. Stack depth = " + stackDepth + ".");
        }
        return (promise && promise.state() === "rejected") ? false : true;
    }
The native function BracketsShellAPI::DispatchBracketsJSCommand calls this function in order to enable
calling Brackets commands from the native shell.