npm install @master4n/family-tree

This package contains various operation for family tree creation. Kindly set true for the below property in your tsconfig.json.

    "experimentalDecorators": true,                 
    "emitDecoratorMetadata": true, 

Files were exported from the package.

 import { FamilyMember } from '@master4n/family-tree'  //Type of FamilyMember

These definitions were written by Master4Novice.