debugValidateChild method
Checks whether the given render object has the correct runtimeType to be a child of this render object.
Does nothing if assertions are disabled.
Always returns true.
Implementation
bool debugValidateChild(RenderObject child) {
assert(() {
if (child is! ChildType) {
throw FlutterError(
'A $runtimeType expected a child of type $ChildType but received a '
'child of type ${child.runtimeType}.\n'
'RenderObjects expect specific types of children because they '
'coordinate with their children during layout and paint. For '
'example, a RenderSliver cannot be the child of a RenderBox because '
'a RenderSliver does not understand the RenderBox layout protocol.\n'
'\n'
'The $runtimeType that expected a $ChildType child was created by:\n'
' $debugCreator\n'
'\n'
'The ${child.runtimeType} that did not match the expected child type '
'was created by:\n'
' ${child.debugCreator}\n'
);
}
return true;
}());
return true;
}