openapi 3.1.0 Schema is missing $defs information

[spacether]

openapi 3.1.0 Schema is missing $defs information
In this file: https://github.com/swagger-api/swagger-core/blob/master/modules/swagger-models/src/main/java/io/swagger/v3/oas/models/media/Schema.java

#defs information is not included from the openapi document schema
This prevents downstream users of this library from being able to implement the 3.1.0 and 2020-12 json schema $defs feature