import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

/**
 * @author shinsuke
 * @author Shunji Makino
 */
public class EditForm {

    @ValidateTypeFailure
    public int crudMode;

    @Required
    @Size(max = 1000)
    public String id;

    @Required
    @Size(max = 20)
    public String sessionId;

	allErrs := field.ErrorList{}
	if transport == nil {
		allErrs = append(allErrs, field.Required(
			fldPath.Child("transport"),
			"transport must be set for GRPC"))
		return allErrs
	}

	if transport.UDS != nil {
		allErrs = append(allErrs, validateUDSConnection(transport.UDS, fldPath)...)
	} else {
		allErrs = append(allErrs, field.Required(
			fldPath.Child("uds"),
			"UDS must be set with GRPC"))
	}
	return allErrs

    ```

## Required query parameters

When you declare a default value for non-path parameters (for now, we have only seen query parameters), then it is not required.

If you don't want to add a specific value but just make it optional, set the default as `None`.

But when you want to make a query parameter required, you can just not declare any default value:

```Python hl_lines="6-7"

    /**
     * Determines the set of artifacts for this variant, if required during graph resolution. Does not necessarily download the artifacts.
     *
     * <p>Note that this may be expensive, for example it may block waiting for access to the source project or for network or IO requests to the source repository, and should be used only when
     * required.
     */
    VariantArtifactGraphResolveMetadata resolveArtifacts();

    /**

                                    "$ref": "#/components/schemas/Body_create_file_files__post"
                                }
                            }
                        },
                        "required": True,
                    },
                    "responses": {
                        "200": {
                            "description": "Successful Response",

            configProperties == [:]
            !reports.xml.required.get()
            !reports.xml.outputLocation.isPresent()
            reports.xml.outputType == Report.OutputType.FILE
            !reports.html.required.get()
            !reports.html.outputLocation.isPresent()
            reports.html.outputType == Report.OutputType.FILE
            !reports.sarif.required.get()
            !reports.sarif.outputLocation.isPresent()

                    "summary": "Update Item",
                    "operationId": "update_item_items__item_id__put",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"type": "integer", "title": "Item Id"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],

import org.gradle.api.provider.Provider;

/**
 * Represents a binary that is created and configured as required.
 *
 * @since 4.5
 * @param <T> The type of binary.
 */
public interface BinaryProvider<T> extends Provider<T> {
    /**
     * Registers an action to execute to configure the binary. The action is executed only when the element is required.
     */
    void configure(Action<? super T> action);

    /**

    @Size(max = 100)
    public String authRealm;

    @Size(max = 10)
    public String protocolScheme;

    @Required
    @Size(max = 100)
    public String username;

    @Size(max = 100)
    public String password;

    @Size(max = 1000)
    public String parameters;

    @Required
    @Size(max = 1000)
    public String webConfigId;

    @Size(max = 1000)
    public String createdBy;

    @ValidateTypeFailure
    public Integer port;

    @Size(max = 10)
    public String protocolScheme;

    @Required
    @Size(max = 100)
    public String username;

    @Size(max = 100)
    public String password;

    @Size(max = 1000)
    public String parameters;

    @Required
    @Size(max = 1000)
    public String fileConfigId;

    @Size(max = 1000)
    public String createdBy;