Reduce more number of visible fields, this time methods that we only …

…use internally, as Windows has a limit of 64k public symbols and we were blowing those out. This further reduces by the public symbols surface by 6,600 elements

Generator/Generator/MethodGen.swift

@@ -110,7 +110,9 @@ func methodGen (_ p: Printer, method: MethodDefinition, className: String, cdef:
  // If this is an internal, and being reference by a property, hide it
  if usedMethods.contains (method.name) {
  inline = "@inline(__always)"
- visibility = "internal"
+ // Try to hide as much as possible, but we know that Godot child nodes will want to use these
+ // (DirectionalLight3D and Light3D) rely on this.
+ visibility = method.name == "get_param" || method.name == "set_param" ? "internal" : "fileprivate"
  allEliminate = "_ "
  methodName = method.name
  } else {