Function import_json 

pub fn import_json(persy: &Persy, read: &mut dyn Read) -> EIRes<()>

Import data to a persy storage reading JSON export

use persy::{Persy, Config};
use persy_expimp::import_json;
use std::fs::OpenOptions;
  
Persy::create("imported.persy")?;
let persy = Persy::open("imported.persy", Config::new())?;
let mut input = OpenOptions::new().read(true).open("file_source.json")?;
import_json(&persy,&mut input)?;