LayoutInterface.php

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<?php
namespace Magento\Framework\View;

interface LayoutInterface
{
    public function getUpdate();

    public function generateXml();

    public function generateElements();

    public function renderElement($name, $useCache = true);

    public function addOutputElement($name);

    public function getOutput();

    public function hasElement($name);

    public function unsetElement($name);

    public function getAllBlocks();

    public function getBlock($name);

    public function getChildBlock($parentName, $alias);

    public function setChild($parentName, $elementName, $alias);

    public function reorderChild($parentName, $childName, $offsetOrSibling, $after = true);

    public function unsetChild($parentName, $alias);

    public function getChildNames($parentName);

    public function getChildBlocks($parentName);

    public function getChildName($parentName, $alias);

    public function addToParentGroup($blockName, $parentGroupName);

    public function getGroupChildNames($blockName, $groupName);

    public function getParentName($childName);

    public function createBlock($type, $name = '', array $arguments = []);

    public function addBlock($block, $name = '', $parent = '', $alias = '');

    public function addContainer($name, $label, array $options = [], $parent = '', $alias = '');

    public function renameElement($oldName, $newName);

    public function getElementAlias($name);

    public function removeOutputElement($name);

    public function getMessagesBlock();

    public function getBlockSingleton($type);

    public function getElementProperty($name, $attribute);

    public function isBlock($name);

    public function isContainer($name);

    public function isManipulationAllowed($name);

    public function setBlock($name, $block);

    public function isCacheable();
}