rule

The rule that defines how the alert is evaluated. Omit to leave unchanged. Each sub-block is replaced whole when present: {@code query}, {@code condition}, {@code evaluation} and {@code noData} are applied only when supplied, and within a supplied block an omitted optional member is cleared to unset (null/absent) rather than preserved from the stored alert or defaulted. See {@link AlertCondition} and {@link AlertEvaluation}.