Function getOwnDefinition

packages/core/src/di/interface/defs.ts:219–222

* Return definition only if it is defined directly on `type` and is not inherited from a base * class of `type`.

(type: any, field: string)

 * class of `type`.
 */
function getOwnDefinition<T>(type: any, field: string): ɵɵInjectableDeclaration<T> | null {
  // if the ɵprov prop exist but is undefined we still want to return null
  return (type.hasOwnProperty(field) && type[field]) || null;
}

/**
 * Read the injectable def (`ɵprov`) for `type` or read the `ɵprov` from one of its ancestors.