updateContent(mainUrl){
        console.log("updateContent was called")
        fetch(mainUrl)
            .then((responseJsonAnyUrl) => responseJsonAnyUrl.json())
            .then((responseJsonAnyUrl) => {
                this.setState({
                    mainUrl: mainUrl,
                    jsonObject: responseJsonAnyUrl
                },
                function testName() {
                    let interval = 20000
                    let ind = this.child.current.getCurrentIndex()
                    let zlengths = this.child.current.getZoneLengths()
                    let option = 1
                    if (ind !== zlengths[0]-1){
                        //didn't iterate trough all content, can't update
                        option=2
                        interval = 5000
                    }
                    console.log('ind', ind)
                    console.log('len', zlengths[0]-1)
                    console.log('interval', interval)
                    this.timeout = setTimeout(
                        function(){
                            if (option===1){
                                this.updateContent(mainUrl)
                            }else if (option===2){
                            //  call testName()
                            }
                        }.bind(this, mainUrl)
                        ,
                        interval)
                }.bind(this))
            })
    }