Document.fromJson constructor
Parse from a json
Implementation
factory Document.fromJson(Map<String, dynamic> json) => Document(
fileName: json['file_name'],
mimeType: json['mime_type'],
minithumbnail: json['minithumbnail'] == null ? null : Minithumbnail.fromJson(json['minithumbnail']),
thumbnail: json['thumbnail'] == null ? null : Thumbnail.fromJson(json['thumbnail']),
document: File.fromJson(json['document']),
);