declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace util {
                abstract class Utf8Appendable {
                    protected static readonly LOG: org.eclipse.jetty.util.log.Logger
                    public static readonly REPLACEMENT: char
                    public static readonly REPLACEMENT_UTF8: byte[]
                    protected readonly _appendable: java.lang.Appendable
                    protected _state: int
                    public constructor(arg0: java.lang.Appendable)
                    public abstract length(): int
                    protected reset(): void
                    public append(arg0: char): void
                    public append(arg0: java.lang.String | string): void
                    public append(arg0: java.lang.String | string, arg1: int, arg2: int): void
                    public append(arg0: byte): void
                    public append(arg0: java.nio.ByteBuffer): void
                    public append(arg0: byte[], arg1: int, arg2: int): void
                    public append(arg0: byte[], arg1: int, arg2: int, arg3: int): boolean
                    protected appendByte(arg0: byte): void
                    public isUtf8SequenceComplete(): boolean
                    protected checkState(): void
                    public toReplacedString(): string
                    public static class: java.lang.Class<any>
                }
                interface Utf8Appendable$$Lambda {
                    (): int
                }
            }
        }
    }
}