childAtPosition method
Implementation
RenderEditableBox childAtPosition(TextPosition position) {
assert(firstChild != null);
final targetNode = _container.queryChild(position.offset, false).node;
var targetChild = firstChild;
while (targetChild != null) {
if (targetChild.getContainer() == targetNode) {
break;
}
targetChild = childAfter(targetChild);
}
if (targetChild == null) {
throw 'targetChild should not be null';
}
return targetChild;
}