translateText method
Translates the given text
from the source language into the target language.
Implementation
Future<String> translateText(String text) async {
final result = await _channel
.invokeMethod('nlp#startLanguageTranslator', <String, dynamic>{
'id': id,
'text': text,
'source': sourceLanguage.bcpCode,
'target': targetLanguage.bcpCode
});
return result.toString();
}