Here is a JSON Schema validation failure taken straight out of the Snowplow test suite (pretty printed): { "level": "error", "schema": { "loadi

Here is a JSON Schema validation failure taken straight out of the Snowplow test suite (pretty printed): { "level": "error", "schema": { "loadingURI": "#", "pointer": "" }, "instance": { "pointer": "" }, "domain": "validation", "keyword": "required", "message": "object has missing required properties ([\"targetUrl\"])", "required": [ "targetUrl" ], "missing": [ "targetUrl" ] } You can't seriously prefer a NullPointerException (or choose your poison) three functions later.