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<v-flex xs12 md3>
<date-time-picker ref="startDate" v-model="startDate" :label="$t('start_date')"
:rules="[rules.required]">
</date-time-picker>
</v-flex>
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<v-text-field slot="activator" :label="label" append-icon="date_range" solo
:value="formattedDate" readonly
:rules="rules">
</v-text-field>