contentType2 method
Implementation
String? contentType2(Map<String,dynamic> headers){
if(headers == null){
return "";
}
String? type = headers["content-type"].toString();
//List<String>
if(type == null || type == "null" || type == "[]"){
type = headers["Content-Type"].toString();
}
if(type == null || type == "null" || type == "[]"){
type = headers["content-Type"].toString();
}
//debugPrint("content type: "+ type);
return type;
}