private static SourceException noPath(final CommonStmtCtx stmt) {
/*
- * https://tools.ietf.org/html/rfc7950#section-9.12
+ * https://www.rfc-editor.org/rfc/rfc7950#section-9.12
*
* When the type is "union", the "type" statement (Section 7.4) MUST be
* present.