Most modifiers cannot be applied to members in a namespace or ambient module. If you try to add them, you will get an error.
namespace A {
static const a = 1;
private const b = 2;
protected const c = 3;
private const d = 4;
}Fix: Remove invalid modifiers.
Remove invalid modifiers:
namespace A {
const a = 1;
const b = 2;
const c = 3;
const d = 4;
}