const props = [ 'foo', 'bar', 'baz' ];

const myObject = {
  _innerSanctum: {}
};

angular.forEach( props, p => {
  myObject._innerSanctum[p] = false;

  Object.defineProperty(myObject, p, {
    get: () => {
      console.log(`return ${p} ${myObject._innerSanctum[p]}`);
      return myObject._innerSanctum[p];
    },
    set: (x) => {
      console.log(`${p} = ${x}`);
      myObject._innerSanctum[p] = x;
    }
  } );
} );