typo3 - How to Create a Multi-Column Custom Content Element -

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i'm trying create custom two-column content element in typo3 neos. i'm aware neos shipped multi-column functionality, particular case need create own custom content element.

so far i've been able create 1 of columns (see below gist code). however, try add second column, page turns blank , no further changes can made.

gists

any idea why happening, or how solve / build multi-column custom content element in neos?

i found solution! had execute following flow command create missing node: ./flow node:autocreatechildnodes --node-type daniel.multicolumn:twocol


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