[PHP][Lumen] body name parameter should be ignore

Description

When I generate a Lumen server stub from swagger editor online, generated controller has param validation for body name. Documentation here
say that this name is ignored but Lumen Stub has check for body name parameter.

Swagger-codegen version

online swagger editor 2.2.3

Swagger declaration file content or url

paths:
  /visite:
    post:
      security:
        - api_key: []
      tags:
        - Visite
      summary: Ajouter une visite
      description: ''
      operationId: addVisite
      consumes:
      - application/json
      produces:
      - application/json
      parameters: 
      - name: body
        in: body
        description: Objet visite à ajouter
        required: true
        schema:
          $ref: '#/definitions/Visite'

Lumen stub has this check :

if (!isset($input['body'])) {
    throw new \InvalidArgumentException('Missing the required parameter $body when calling addVisite');
}

Start with the generated PHP Lumen controller and its body-parameter validation shown in the issue, then trace back to the Lumen server stub template that produces it. Compare the validation with the Swagger 2.0 request-body rules and update the behavior so the body parameter name is ignored; confirm generation and request validation no longer require that name.