[Vuejs]-How to display a datatable through an accordion

Resolved!
In case of (if people encounter the same problem as I had), here is the code (html / js).

//html goes here

<div id="app">
<v-app id="inspire">
<v-data-table :headers="mainHeaders"
:items="mainItems"
item-key="title"
hide-actions
expand
class="elevation-1">
<template slot="items" scope="props">
<tr @click="props.expanded = !props.expanded">
<td class="text-xs">{{ props.item.title }}</td>
</tr>
</template>
<template slot="expand" scope="props">
<v-data-table :headers="subHeaders"
:items="subItems"
item-key="pain"
hide-actions
class="elevation-10">
<template slot="items" scope="props">
<td class="text-xs">{{ props.item.pain }}</td>
<td class="text-xs">{{ props.item.type }}</td>
</template>
</v-data-table>
</template>
</v-data-table>  </v-app>
</div>

//js goes here

export default {
name: 'accordion-table',
mounted () {
},
data () {
return {
mainHeaders: [
{ text: 'Medical informations', value: 'title' }
],
mainItems: [
{ title: 'Medical Checkup' },
{ title: 'Application connected' },
{ title: 'Programs' },
{ title: 'Pain List' }
],
subHeaders: [
{ text: 'Pain', value: 'pain' },
{ text: 'Type', value: 'type' }
],
subItems: [
{ pain: 'Knee', type: '1' },
{ pain: 'Ankle', type: '2' },
{ pain: 'Back', type: '3' },
{ pain: 'Neck', type: '4' }
]
}
}
}

(I used random values)
Hope it helps some of you