Closes #14

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+ * @copyright Slendium 2026
+ */
+#[Attribute(Attribute::TARGET_PARAMETER)]
+class NonEmpty implements ArgumentValidator {

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+ * @author C. Fahner
+ * @copyright Slendium 2026
+ */
+final class ArgumentCasts {

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+			'float' => ArgumentCasts::toFloat($arg->value),
+			'string' => ArgumentCasts::toString($arg->value),
+			Field::class => ArgumentCasts::toField($arg->value),
+			default => ResourceException::forUnsupportedType($param->name, $type)

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+			$type === null => ResourceException::forMissingType($param->name),
+			$type instanceof ReflectionNamedType => self::castArgumentTyped($param, $arg, $type->getName()),
+			$type instanceof ReflectionUnionType => self::castArgumentUnion($param, $type, $arg),
+			$type instanceof ReflectionIntersectionType => ResourceException::forUnsupportedType($param->name, $type),

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+ *
+ * To define an HTTP-method for the resource, simply add a class-method with the same name as the
+ * HTTP-method. The class-method must be `public` and must declare a return type that is covariant
+ * with `?Method`. To ensure the method's possible responses can be properly documented (eg. for OpenAPI),

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+
+use Exception;
+
+/**

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+
+/**
+ * Indicates a problem with the way the resource has been declared.
+ *

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+use Slendium\Framework\Builders\ResponseBuilder;
+
+/**
+ * Modifies a resource method's response before it is sent back.

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+		$this->assertSame(2, $result);
+	}
+
+	public function test_parameters_shouldHaveExpectedCount_whenEvaluatingImpliedHeadMethod(): void {