validate property
validate the node.
return true if the node is valid. return false if the node is invalid, and the node will be displayed as a PlaceHolder widget.
Implementation
@override
BlockComponentValidate get validate => (node) => node.children.isEmpty;validate the node.
return true if the node is valid. return false if the node is invalid, and the node will be displayed as a PlaceHolder widget.
Implementation
BlockComponentValidate validate = (_) => true;