What is strfmt.Registry in go-swagger - go

Question

I have a error model that looked like this
Error:
type: object
properties:
code:
type: string
example: missing_field
description: This field contains a string succinctly identifying the problem.
message:
type: string
example: The `first_name` field is required.
description: This field contain a plainly-written, developer-oriented explanation of the solution to the problem in complete, well-formed sentences.
more_info:
type: string
format: url
example: https://docs.api.example.com/v2/users/create_user#first_name
description: This field SHOULD contain a publicly-accessible URL where information about the error can be read in a web browser.
target:
$ref: '#/definitions/Error_target'
description: error model
I used go-swagger to generate server stub. In models/error.go file
import (
"context"
"github.com/go-openapi/errors"
"github.com/go-openapi/strfmt"
"github.com/go-openapi/swag"
)
// swagger:model Error
type Error struct {
// This field contains a string succinctly identifying the problem.
// Example: missing_field
Code string `json:"code,omitempty"`
// This field contain a plainly-written, developer-oriented explanation of the solution to the problem in complete, well-formed sentences.
// Example: The `first_name` field is required.
Message string `json:"message,omitempty"`
// This field SHOULD contain a publicly-accessible URL where information about the error can be read in a web browser.
// Example: https://docs.api.example.com/v2/users/create_user#first_name
MoreInfo string `json:"more_info,omitempty"`
// target
Target *ErrorTarget `json:"target,omitempty"`
}
// Validate validates this error
func (m *Error) Validate(formats strfmt.Registry) error {
var res []error
if err := m.validateTarget(formats); err != nil {
res = append(res, err)
}
if len(res) > 0 {
return errors.CompositeValidationError(res...)
}
return nil
}
func (m *Error) validateTarget(formats strfmt.Registry) error {
...
}
The function Validate(formats strfmt.Registry) takes in a parameter called formats of type strfmt.Registry. Not sure, how and where to use this validate function and what to pass a argument for formats. Any example is greatly appreciated.