[BUG] Functions described in documentation but not present in code

[BUG] Functions described in documentation but not present in code

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

After generation some functions are explained in the documentation but they does not exist in the code.
Unfortunately I need these functions.

After generation:

$ grep -R SetDefaultNil docs/*
docs/CustomField.md:### SetDefaultNil
docs/CustomField.md:`func (o *CustomField) SetDefaultNil(b bool)`
docs/CustomField.md: SetDefaultNil sets the value for Default to be an explicit nil
docs/CustomFieldRequest.md:### SetDefaultNil
docs/CustomFieldRequest.md:`func (o *CustomFieldRequest) SetDefaultNil(b bool)`
docs/CustomFieldRequest.md: SetDefaultNil sets the value for Default to be an explicit nil
docs/PatchedWritableCustomFieldRequest.md:### SetDefaultNil
docs/PatchedWritableCustomFieldRequest.md:`func (o *PatchedWritableCustomFieldRequest) SetDefaultNil(b bool)`
docs/PatchedWritableCustomFieldRequest.md: SetDefaultNil sets the value for Default to be an explicit nil
docs/WritableCustomFieldRequest.md:### SetDefaultNil
docs/WritableCustomFieldRequest.md:`func (o *WritableCustomFieldRequest) SetDefaultNil(b bool)`
docs/WritableCustomFieldRequest.md: SetDefaultNil sets the value for Default to be an explicit nil
$ grep -R SetDefaultNil *.go
$

openapi-generator version

v7.9.0

I don't think that it's a regression.

OpenAPI declaration file content or url

default:                                                                                    
  nullable: true                                                                            
  description: Default value for the field (must be a JSON value). Encapsulate strings with double quotes (e.g. "Foo").

Complete file: https://raw.githubusercontent.com/netbox-community/go-netbox/refs/tags/v4.0.3-0/api/openapi.yaml

Generation Details

Steps to reproduce

$ git clone git@github.com:netbox-community/go-netbox.git
$ git checkout v4.0.3-0
$ make
$ make build

Related issues/PRs

I tried to look at the current issues but there is so much issues, perhaps some of them are related to this issue ...

Suggest a fix

Not able to fix the issue for the moment.

Reproduce the generation using the linked openapi.yaml, the v4.0.3-0 go-netbox checkout, and the listed make and make build commands. Compare docs/CustomField.md and the other docs containing SetDefaultNil with the generated *.go files; done means the documented functions and generated code agree.