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layout

Button – core/button

Columns – core/columns

CSS – oik-block/css

CSV – oik-block/csv

GeSHi – oik-block/geshi

Group – core/group

Media & Text – core/media-text

More – core/more

Page Break – core/nextpage

Separator – core/separator

Shortcode block – oik-block/shortcode-block

Spacer – core/spacer

Text Columns (deprecated) – core/text-columns