$StartPageToken.fromJson constructor Null safety

$StartPageToken.fromJson(
  1. Map _json
)

Implementation

$StartPageToken.fromJson(core.Map _json)
    : this(
        kind: _json.containsKey('kind') ? _json['kind'] as core.String : null,
        startPageToken: _json.containsKey('startPageToken')
            ? _json['startPageToken'] as core.String
            : null,
      );