public Utf8JsonReader(System.ReadOnlySpan <byte> jsonData, bool isFinalBlock, System.Text.Json.JsonReaderState state)
 {
     throw null;
 }
 public Utf8JsonReader(System.Buffers.ReadOnlySequence <byte> jsonData, bool isFinalBlock, System.Text.Json.JsonReaderState state)
 {
     throw null;
 }