Saver
Module provides methods that works with saver
save — returns saved data
  Reduces each Block sequently and calls Block save method. Returns Promise with data
This method has no arguments
          Promise<OutputData>
         | 
              Returns output data via Promise | 
save(): Promise<OutputData>
  See a «Saving data» chapter for usage example and output format information.
    ☝️
  
      
      Note.
    
    
class MyTool {
  constructor({data, api}){
    this.api = api;
    // ...
  }
  save() {
    const savedData = this.api.saver.save(); // ...
  }
  // ... other methods
}