goja-core/src/main/java/goja/core/libs/Codec.java
public static String encodeBASE64(String value) {
        try {
            return new String(Base64.encodeBase64(value.getBytes(StringPool.UTF_8)));
        } catch (UnsupportedEncodingException ex) {
            throw new UnexpectedException(ex);
        }
    }
public static String encodeBASE64(String value) {
        try {
            return new String(Base64.encodeBase64(value.getBytes(StringPool.UTF_8)));
        } catch (UnsupportedEncodingException ex) {
            throw new UnexpectedException(ex);
        }
    }
Encode a String to base64

@param value The plain String
@return The base64 encoded String