kubernetes/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/model/schemas.go

// SchemaDeclType converts the structural schema to a CEL declaration, or returns nil if the
// structural schema should not be exposed in CEL expressions.
// Set isResourceRoot to true for the root of a custom resource or embedded resource.
//
// Schemas with XPreserveUnknownFields not exposed unless they are objects. Array and "maps" schemas
// are not exposed if their items or additionalProperties schemas are not exposed. Object Properties are not exposed
// if their schema is not exposed.
//
// The CEL declaration for objects with XPreserveUnknownFields does not expose unknown fields.
func SchemaDeclType(s *schema.Structural, isResourceRoot bool) *apiservercel.DeclType { … }

// WithTypeAndObjectMeta ensures the kind, apiVersion and
// metadata.name and metadata.generateName properties are specified, making a shallow copy of the provided schema if needed.
func WithTypeAndObjectMeta(s *schema.Structural) *schema.Structural { … }