Set a config, attribute, or child on this node.
Source
operator []=(String name, value) {
if (name.startsWith(r"$") || name.startsWith(r"@")) {
if (name.startsWith(r"$")) {
configs[name] = value;
} else {
attributes[name] = value;
}
} else {
if (value == null) {
return removeChild(name);
} else if (value is Map) {
return createChild(name, value);
} else {
addChild(name, value);
return value;
}
}
}