In the vuetify online doc ( Grid systrem # Unique layouts ) the v-flex tag for the Orange block has a child-flex parameter
<v-flex d-flex xs12 sm2 child-flex>
<v-card color="orange lighten-2" tile flat>
<v-card-text>ORANGE --- {{ lorem.slice(0, 90) }}</v-card-text>
</v-card>
</v-flex>
I cannot find any explanation on child-flex ... what's that ? what is the usage ? thanks for feedback or link to any doc paragraph I could have missed