ReferenceGrant.spec.to[].kind

Kind is the kind of the referent. Although implementations may support additional resources, the following types are part of the "Core" support level for this field: * Secret when used to permit a SecretObjectReference * Service when used to permit a BackendObjectReference

• minLength: 1
• maxLength: 63
• pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$