declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace websocket {
                namespace api {
                    namespace extensions {
                        class ExtensionConfig {
                            public static parse(arg0: java.lang.String | string): org.eclipse.jetty.websocket.api.extensions.ExtensionConfig
                            public static parseEnum(arg0: java.util.Enumeration<java.lang.String>): java.util.List<org.eclipse.jetty.websocket.api.extensions.ExtensionConfig>
                            public static parseList(...arg0: java.lang.String[]): java.util.List<org.eclipse.jetty.websocket.api.extensions.ExtensionConfig>
                            public static toHeaderValue(arg0: java.util.List<org.eclipse.jetty.websocket.api.extensions.ExtensionConfig>): string
                            public constructor(arg0: org.eclipse.jetty.websocket.api.extensions.ExtensionConfig)
                            public constructor(arg0: java.lang.String | string)
                            public getName(): string
                            public getParameter(arg0: java.lang.String | string, arg1: int): int
                            public getParameter(arg0: java.lang.String | string, arg1: java.lang.String | string): string
                            public getParameterizedName(): string
                            public getParameterKeys(): java.util.Set<java.lang.String>
                            public getParameters(): java.util.Map<java.lang.String, java.lang.String>
                            public init(arg0: org.eclipse.jetty.websocket.api.extensions.ExtensionConfig): void
                            public setParameter(arg0: java.lang.String | string): void
                            public setParameter(arg0: java.lang.String | string, arg1: int): void
                            public setParameter(arg0: java.lang.String | string, arg1: java.lang.String | string): void
                            public toString(): string
                            public static class: java.lang.Class<any>
                        }
                    }
                }
            }
        }
    }
}