And these models are all sharing a lot of the data and duplicating attribute names and types.

We could do better.

We can declare a `UserBase` model that serves as a base for our other models. And then we can make subclasses of that model that inherit its attributes (type declarations, validation, etc).

All the data conversion, validation, documentation, etc. will still work as normally.

        } catch (final UnsupportedEncodingException ex) {
            throw new IORuntimeException(ex);
        }
    }

    /**
     * Encodes the value of an attribute.
     *
     * @param s
     *            The attribute value.
     * @return The encoded attribute value.
     */
    public static String encodeAttrQuot(final String s) {
        if (s == null) {
            return null;
        }

### `UploadFile` { #uploadfile }

`UploadFile` has the following attributes:

* `filename`: A `str` with the original file name that was uploaded (e.g. `myimage.jpg`).
* `content_type`: A `str` with the content type (MIME type / media type) (e.g. `image/jpeg`).

            return matcher.replaceAll(" ").trim();
        }
        return value;
    }

    /**
     * Adds an attribute to the factory.
     * @param name The name of the attribute.
     * @param value The value of the attribute.
     */
    public void addAttribute(final String name, final Object value) {
        attributeMap.put(name, value);
    }

    /**

import org.apache.maven.artifact.versioning.VersionRange;
import org.apache.maven.project.MavenProject;

/**
 * Wraps an active project instance to be able to receive updates from its artifact without affecting the original
 * attributes of this artifact.
 *
 * TODO I think this exposes a design flaw in that the immutable and mutable parts of an artifact are in one class and

     * Complete this operation immediately with an oplock break if it would break an oplock
     */
    public static final int FILE_COMPLETE_IF_OPLOCKED = 0x100;
    /**
     * The client does not understand extended attributes
     */
    public static final int FILE_NO_EA_KNOWLEDGE = 0x200;
    /**
     * Open a remote instance of the file
     */
    public static final int FILE_OPEN_REMOTE_INSTANCE = 0x400;
    /**

 * from specific HTML tags and attributes.
 * </p>
 *
 * <p>
 * <b>Configuration:</b>
 * </p>
 * <ul>
 *   <li><b>featureMap:</b> A map of features to be set on the DOM parser.</li>
 *   <li><b>propertyMap:</b> A map of properties to be set on the DOM parser.</li>
 *   <li><b>childUrlRuleMap:</b> A map of HTML tag names to attribute names, used
 *       to extract child URLs.</li>

        @Test
        @DisplayName("Should encode RID with attribute correctly")
        void testEncode() throws NdrException {
            // Given: RID with attribute
            samr.SamrRidWithAttribute ridWithAttribute = new samr.SamrRidWithAttribute();
            ridWithAttribute.rid = 100;
            ridWithAttribute.attributes = 200;

            // When: Encoding

			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminNoSuchUser, err), r.URL)
			return
		}

		// Add LDAP attributes that were looked up into the claims.
		for attribKey, attribValue := range lookupResult.Attributes {
			opts.claims[ldapAttribPrefix+attribKey] = attribValue
		}
	}

	newCred, updatedAt, err := globalIAMSys.NewServiceAccount(ctx, targetUser, targetGroups, opts)

     */
    public static OptionalEntity<Role> getRole(final CreateForm form) {
        return getEntity(form).map(entity -> {
            copyMapToBean(form.attributes, entity, op -> op.exclude(Constants.COMMON_CONVERSION_RULE));
            copyBeanToBean(form, entity, op -> op.exclude(Constants.COMMON_CONVERSION_RULE));
            return entity;
        });
    }