open method
Implementation
Future<CPDFDocumentError> open(String filePath,
{String password = ''}) async {
try {
var error = await _channel.invokeMethod(
'open_document', {'filePath': filePath, 'password': password});
var type = CPDFDocumentError.values.where((e) => e.name == error).first;
if (type == CPDFDocumentError.success) {
_isValid = true;
}
return type;
} on PlatformException {
return CPDFDocumentError.unknown;
}
}