getBlockBlobClient(blobName) {
        return new BlockBlobClient(appendToURLPath(this.url, EscapePath(blobName)), this.pipeline);
    }
Creates a {@link BlockBlobClient}

@param blobName - A block blob name


Example usage:

```js
const content = "Hello world!";

const blockBlobClient = containerClient.getBlockBlobClient("<blob name>");
const uploadBlobResponse = await blockBlobClient.upload(content, content.length);
```