You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: schema.go
    path of file: ./repos/hubble-ui/backend/vendor/github.com/go-openapi/spec
    
    the code of the file until where you have to start completion: // Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Versio
    
func (s Schema) MarshalJSON() ([]byte, error) {
	b1, err := json.Marshal(s.SchemaProps)
	if err != nil {
		return nil, fmt.Errorf("schema props %v", err)
	}
	b2, err := json.Marshal(s.VendorExtensible)
	if err != nil {
		return nil, fmt.Errorf("vendor props %v", err)
	}
	b3, err := s.Ref.MarshalJSON()
	if err != nil {
		return nil, fmt.Errorf("ref prop %v", err)
	}
	b4, err := s.Schema.MarshalJSON()
	if err != nil {
		return nil, fmt.Errorf("schema prop %v", err)
	}
	b5, err := json.Marshal(s.SwaggerSchemaProps)
	if err != nil {
		return nil, fmt.Errorf("common validations %v", err)
	}
	var b6 []byte
	if s.ExtraProps != nil {
		jj, err := json.Marshal(s.ExtraProps)
		if err != nil {
			return nil, fmt.Errorf("extra props %v", err)
		}
		b6 = jj
	}
	return swag.ConcatJSON(b1, b2, b3, b4, b5, b6), nil
}