if enableNamespacesByDefault {
				m := msg.NewNamespaceInjectionEnabledByDefault(r)
				c.Report(gvk.Namespace, m)
				return true
			}

			m := msg.NewNamespaceNotInjected(r, ns, ns)

			if line, ok := util.ErrorLine(r, fmt.Sprintf(util.MetadataName)); ok {
				m.Line = line
			}

			c.Report(gvk.Namespace, m)
			return true
		}

	return diag.NewMessage(
		ReferencedResourceNotFound,
		r,
		reftype,
		refval,
	)
}

// NewNamespaceNotInjected returns a new diag.Message based on NamespaceNotInjected.
func NewNamespaceNotInjected(r *resource.Instance, namespace string, namespace2 string) diag.Message {
	return diag.NewMessage(
		NamespaceNotInjected,
		r,
		namespace,
		namespace2,
	)