如何在Fabric GO SDK中添加认可策略JSON？

I am currently trying to add an endorsement policy json in Go SDK. But not able to find proper api in Hyperledger Fabric Go.

As in Node.js sendTransactionProposal() api is available to add the endorsement policy JSON. Similarly in Fabric Go-SDK, how to use this endorsement policy json.

{
identities: [{
        role: {
            name: 'member',
            mspId: 'Org1MSP'
        }
    },
    {
        role: {
            name: 'member',
            mspId: 'Org2MSP'
        }
    }
],
policy: {
    '2-of': [{
        'signed-by': 0
    }, {
        'signed-by': 1
    }]
}  }

please suggest me some solution