public override void ApplyAttributeBuilder(Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa)
{
//if (a.IsValidSecurityAttribute ()) {
// a.ExtractSecurityPermissionSet (ctor, ref declarative_security);
// return;
//}
if (a.Type == pa.MethodImpl) {
is_external_implementation = a.IsInternalCall ();
}
ConstructorBuilder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), cdata);
}