}
}
public SystemDefinitionNode copyUpdatePackage_do_(final st.gravel.core.Symbol _packageName, final st.gravel.support.jvm.Block1<PackageNode, PackageNode> _aBlock) {
final int _idx;
final PackageNode _updatedPackage;
_idx = st.gravel.support.jvm.ArrayExtensions.indexWhere_(_packageNodes, new st.gravel.support.jvm.Predicate1<PackageNode>() {
@Override
public boolean value_(final PackageNode _pkg) {
return st.gravel.support.jvm.ObjectExtensions.equals_(_pkg.name(), _packageName);