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<template> <div> <contract-detail-sub ref="contractDetailSub"></contract-detail-sub> <el-button @click="switchContract">Switch Contract</el-button> </div> </template> <script> import ContractDetailSub from '@/components/contract/contractDetailSub' export default { components: { ContractDetailSub }, methods: { switchContract() { this.$refs.contractDetailSub.switch({ contractId: '12345' }) } } } </script>