getString method

String getString(
  1. String key, [
  2. String? defaultValue
])

returns the value corresponding with key as String if null returns defaultValue

Implementation

String getString(String key, [String? defaultValue]) {
  var val = _params[key] ?? defaultValue;
  if (val == null) {
    throw MissingRequiredParameterError(
        'Failed to parse [String] $key value from ${_params[key]}');
  }
  return val;
}