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    <h3>Editing: Interface_.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);

namespace PhpParser\Builder;

use PhpParser;
use PhpParser\BuilderHelpers;
use PhpParser\Node;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt;

class Interface_ extends Declaration {
    protected string $name;
    /** @var list&lt;Name&gt; */
    protected array $extends = [];
    /** @var list&lt;Stmt\ClassConst&gt; */
    protected array $constants = [];
    /** @var list&lt;Stmt\ClassMethod&gt; */
    protected array $methods = [];
    /** @var list&lt;Node\AttributeGroup&gt; */
    protected array $attributeGroups = [];

    /**
     * Creates an interface builder.
     *
     * @param string $name Name of the interface
     */
    public function __construct(string $name) {
        $this-&gt;name = $name;
    }

    /**
     * Extends one or more interfaces.
     *
     * @param Name|string ...$interfaces Names of interfaces to extend
     *
     * @return $this The builder instance (for fluid interface)
     */
    public function extend(...$interfaces) {
        foreach ($interfaces as $interface) {
            $this-&gt;extends[] = BuilderHelpers::normalizeName($interface);
        }

        return $this;
    }

    /**
     * Adds a statement.
     *
     * @param Stmt|PhpParser\Builder $stmt The statement to add
     *
     * @return $this The builder instance (for fluid interface)
     */
    public function addStmt($stmt) {
        $stmt = BuilderHelpers::normalizeNode($stmt);

        if ($stmt instanceof Stmt\ClassConst) {
            $this-&gt;constants[] = $stmt;
        } elseif ($stmt instanceof Stmt\ClassMethod) {
            // we erase all statements in the body of an interface method
            $stmt-&gt;stmts = null;
            $this-&gt;methods[] = $stmt;
        } else {
            throw new \LogicException(sprintf('Unexpected node of type &quot;%s&quot;', $stmt-&gt;getType()));
        }

        return $this;
    }

    /**
     * Adds an attribute group.
     *
     * @param Node\Attribute|Node\AttributeGroup $attribute
     *
     * @return $this The builder instance (for fluid interface)
     */
    public function addAttribute($attribute) {
        $this-&gt;attributeGroups[] = BuilderHelpers::normalizeAttribute($attribute);

        return $this;
    }

    /**
     * Returns the built interface node.
     *
     * @return Stmt\Interface_ The built interface node
     */
    public function getNode(): PhpParser\Node {
        return new Stmt\Interface_($this-&gt;name, [
            'extends' =&gt; $this-&gt;extends,
            'stmts' =&gt; array_merge($this-&gt;constants, $this-&gt;methods),
            'attrGroups' =&gt; $this-&gt;attributeGroups,
        ], $this-&gt;attributes);
    }
}
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