A couple of questions about Flow + React?

Question

React

Hello everyone
The tickets object is passed to the component.
Such situation :

//@flow

import React, { Component } from "react";
import "./index.scss"; // почему он ругается? Стили подтягиваются в порядке из этого файла

type Props = {
  tickets: number, // как проверить на наличие объекта?
};

class Dashboard extends React.Component<Props> {
  render() {
    const { tickets } = this.props;
    console.log(tickets);
    return <div />;
  }
}

export default Dashboard;

Questions:
1) Why swears at styles? Webpack finds this file, but Flow says it can't find it
2) Set it to tickets number, but an object comes. Why doesn't he swear?
3) How to check tickets for an object?
Thanks