fn unsupported_reason(schema: &Value) -> Option<&'static str>Expand description
The first unsupported keyword in schema or in a subschema under it.
A keyword is looked for only where a schema puts keywords. The keys of
properties are a tool’s parameter names, so a parameter called if or
definitions is a name, and only the subschema under it is searched. A
value that is not a subschema, such as an enum member or a default, is
not searched at all.