smarty - Template inheritance: remove block that was added in grandparent and appended to in parent -

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in smarty template, have 3 templates:

base.tpl

{block name="myblock"}     base {/block}

child.tpl

{extends file="base.tpl"} {block name="myblock" append}     child {/block}

grandchild.tpl

{extends file="child.tpl"} {block name="myblock"}{/block}

when rendering grandchild.tpl, output is

base

so grandchild-template wants replace content of whole block, replaces appended part. how delete whole block?

related: how remove content appended block in parent template?

the solution here in child.tpl change block definition from:

{block name="myblock" append}     child {/block}

into:

{block name="myblock"}     {$smarty.block.parent} child {/block}

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