#### Operação

"Operação" aqui se refere a um dos "métodos" HTTP.

Um dos:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...e os mais exóticos:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

No protocolo HTTP, você pode se comunicar com cada rota usando um (ou mais) desses "métodos".

---

			found := dataUsageHash(k)
			return &found
		}
	}
	return nil
}

// deleteRecursive will delete an entry recursively, but not change its parent.
func (d *dataUsageCache) deleteRecursive(h dataUsageHash) {
	if existing, ok := d.Cache[h.String()]; ok {
		// Delete first if there should be a loop.
		delete(d.Cache, h.Key())
		for child := range existing.Children {
			d.deleteRecursive(dataUsageHash(child))
		}
	}

                                                                <button type="button" class="btn btn-danger btn-xs"
                                                                        name="delete" data-toggle="modal"
                                                                        data-target='#confirmToDelete-${f:h(artifact.name)}-${f:h(artifact.version).replace(".", "\\.")}'

     * @param form the edit form containing the log entry information
     * @return HTML response redirecting to the list page after deletion
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse delete(final EditForm form) {
        verifyCrudMode(form.crudMode, CrudMode.DETAILS);
        validate(form, messages -> {}, this::asDetailsHtml);
        verifyToken(this::asDetailsHtml);

        sb.append(dm).append(sortOrder);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(value);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

Normally you use:

* `POST`: to create data.
* `GET`: to read data.
* `PUT`: to update data.
* `DELETE`: to delete data.

So, in OpenAPI, each of the HTTP methods is called an "operation".

We are going to call them "**operations**" too.

#### Define a *path operation decorator* { #define-a-path-operation-decorator }

    /**
     * Mode for editing an existing record.
     */
    public static final int EDIT = 2;

    /**
     * Mode for deleting a record.
     */
    public static final int DELETE = 3;

    /**
     * Mode for viewing record details.
     */
    public static final int DETAILS = 4;

    /**
     * Protected constructor to prevent instantiation.
     */
    protected CrudMode() {

                                                                                <button type="submit"
                                                                                        class="btn btn-outline-light"
                                                                                        name="delete"

    /** Permission to delete a file or directory */
    public static final int FILE_DELETE = 0x00000040; // 7
    /** Permission to read file attributes */
    public static final int FILE_READ_ATTRIBUTES = 0x00000080; // 8
    /** Permission to write file attributes */
    public static final int FILE_WRITE_ATTRIBUTES = 0x00000100; // 9
    /** Standard delete permission */

  fun invalidatesCache(method: String): Boolean =
    (
      method == "POST" ||
        method == "PATCH" ||
        method == "PUT" ||
        method == "DELETE" ||
        method == "MOVE"
    )

  @JvmStatic // Despite being 'internal', this method is called by popular 3rd party SDKs.
  fun requiresRequestBody(method: String): Boolean =
    (
      method == "POST" ||