Base64 Encoder

[string/Base64 Encoder]

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---

Encodes the string to base64 format. Example:

1. `encoding` set to "utf8"<br>
2. "foo"@0 received via `string`<br>
3. "Zm9v"@0 sent via `base64`<br>
<br>
```<br>

---

### Input ports

* __string__: ` string `

    Receives string to be encoded.<br>
    <br>
    Example:<br>
    ```<br>
    "foo"<br>
    ```<br>


* __encoding__: ` string `

    Receives character encoding of the string.<br>
    <br>
    Example:<br>
    ```<br>
    "utf8"<br>
    ```<br>

### Output ports

* __base64__: ` string `

    Sends base64 encoded string.<br>
    <br>
    Example:<br>
    ```<br>
    "Zm9v"<br>
    ```<br>