rename to core

core/shared/domain/Option.ts

@@ -0,0 +1,7 @@
+export function coalesce<T>(value: T | undefined | null, fallback: T): T {
+  return value ?? fallback;
+}
+
+export function present<T>(value: T | undefined | null): T | undefined {
+  return value === undefined || value === null ? undefined : value;
+}