How to use the indy-sdk.buildSchemaRequest function in indy-sdk

exports.sendSchema = async function(poolHandle, walletHandle, Did, schema) {
    // schema = JSON.stringify(schema); // FIXME: Check JSON parsing
    let schemaRequest = await indy.buildSchemaRequest(Did, schema);
    await indy.signAndSubmitRequest(poolHandle, walletHandle, Did, schemaRequest)
};

exports.sendSchema = async function(poolHandle, walletHandle, Did, schema) {
    let schemaRequest = await sdk.buildSchemaRequest(Did, schema);
    await sdk.signAndSubmitRequest(poolHandle, walletHandle, Did, schemaRequest)
};

exports.createSchema = async function (name, version, attributes) {
    let [id, schema] = await sdk.issuerCreateSchema(await indy.did.getEndpointDid(), name, version, attributes);
    let schemaRequest = await sdk.buildSchemaRequest(await indy.did.getEndpointDid(), schema);
    await sdk.signAndSubmitRequest(await indy.pool.get(), await indy.wallet.get(), await indy.did.getEndpointDid(), schemaRequest);
    await indy.did.pushEndpointDidAttribute('schemas', id);
};