s202226701001/sever-test/node_modules/@opentelemetry/api/build/esnext/trace/trace_state.d.ts

export interface TraceState {
    /**
     * Create a new TraceState which inherits from this TraceState and has the
     * given key set.
     * The new entry will always be added in the front of the list of states.
     *
     * @param key key of the TraceState entry.
     * @param value value of the TraceState entry.
     */
    set(key: string, value: string): TraceState;
    /**
     * Return a new TraceState which inherits from this TraceState but does not
     * contain the given key.
     *
     * @param key the key for the TraceState entry to be removed.
     */
    unset(key: string): TraceState;
    /**
     * Returns the value to which the specified key is mapped, or `undefined` if
     * this map contains no mapping for the key.
     *
     * @param key with which the specified value is to be associated.
     * @returns the value to which the specified key is mapped, or `undefined` if
     *     this map contains no mapping for the key.
     */
    get(key: string): string | undefined;
    /**
     * Serializes the TraceState to a `list` as defined below. The `list` is a
     * series of `list-members` separated by commas `,`, and a list-member is a
     * key/value pair separated by an equals sign `=`. Spaces and horizontal tabs
     * surrounding `list-members` are ignored. There can be a maximum of 32
     * `list-members` in a `list`.
     *
     * @returns the serialized string.
     */
    serialize(): string;
}
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