| (NullableSpanT to NullableReadOnlySpanT) | Implicitly converts a NullableSpanT to a NullableReadOnlySpanT. |
| (ReadOnlySpanT to NullableReadOnlySpanT) | Implicitly converts a ReadOnlySpanT to a NullableReadOnlySpanT. |
| (SpanT to NullableReadOnlySpanT) | Implicitly converts a SpanT to a NullableReadOnlySpanT. |