https://fluttergems.dev/packages/conditioned/
conditioned - Flutter package in Widget Extension category | Flutter Gems
conditioned is a Flutter package. This package contains a Widget that will let you show a child Widget based on provided conditions.
widget extensionconditionedflutterpackagecategory
https://fluttergems.dev/packages/conditional_builder_null_safety/
conditional_builder_null_safety - Flutter package in Widget Extension category | Flutter Gems
conditional_builder_null_safety is a Flutter package. Show UI elements according for conditional type and supports null safety
null safetywidget extensionconditionalbuilderflutter
https://support.metabox.io/topic/extension-suggestion-widget-builder/
Extension suggestion - Widget Builder - Meta Box
Jun 30, 2021 - Hello, i had an idea of integrating widgets with metabox builder to create new custom widgets with the power of metabox fields, it would be cool. thank you.
widget builderextensionsuggestionmetabox
https://justinribeiro.com/chronicle/2010/08/25/a-simple-extension-of-the-jquery-ui-combobox-widget-example/
A simple extension of the jQuery UI combobox widget example - Justin Ribeiro, Ph.D.