// Good: PascalCase for types, camelCase for values, is/has prefix for booleans
interface UserProfile {
  displayName: string;
  isVerified: boolean;
}

function getDisplayName(profile: UserProfile): string {
  return profile.displayName;
}

const profile: UserProfile = { displayName: "Ada", isVerified: true };
console.log(getDisplayName(profile));