[**brk-client**](../README.md) *** [brk-client](../globals.md) / SingleItemBuilder # Interface: SingleItemBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:982](https://github.com/bitcoinresearchkit/brk/blob/54827cd0a2357417adb8631eb8f53a78e848b39a/modules/brk-client/index.js#L982) ## Type Parameters ### T `T` ## Properties ### fetch() > **fetch**: (`onUpdate?`) => `Promise`\<[`MetricData`](MetricData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:983](https://github.com/bitcoinresearchkit/brk/blob/54827cd0a2357417adb8631eb8f53a78e848b39a/modules/brk-client/index.js#L983) Fetch the item #### Parameters ##### onUpdate? (`value`) => `void` #### Returns `Promise`\<[`MetricData`](MetricData.md)\<`T`\>\> *** ### fetchCsv() > **fetchCsv**: () => `Promise`\<`string`\> Defined in: [Developer/brk/modules/brk-client/index.js:984](https://github.com/bitcoinresearchkit/brk/blob/54827cd0a2357417adb8631eb8f53a78e848b39a/modules/brk-client/index.js#L984) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:985](https://github.com/bitcoinresearchkit/brk/blob/54827cd0a2357417adb8631eb8f53a78e848b39a/modules/brk-client/index.js#L985) Thenable