packages/core/parcel-bundler/src/visitors/env.js
function morph(object, newProperties) {
  for (let key in object) {
    delete object[key];
  }

  for (let key in newProperties) {
    object[key] = newProperties[key];
  }
}
function morph(object, newProperties) {
  for (let key in object) {
    delete object[key];
  }

  for (let key in newProperties) {
    object[key] = newProperties[key];
  }
}
function morph ( object , newProperties ) { for ( let key in object ) { delete object [ key ] ; } for ( let key in newProperties ) { object [ key ] = newProperties [ key ] ; } }
replace object properties
replace object properties