import type { Context } from "@opentelemetry/api";
import type { Span } from "@opentelemetry/sdk-trace-base";
import { OnEndingHookSpanProcessor } from "./on-ending-hook-span-processor.js";
/**
 * A SpanProcessor that captures pseudo-profiling data (CPU time and memory usage)
 * for each span and adds them as span attributes.
 *
 * This processor wraps the span's end() method to capture profiling metrics
 * just before the span is marked as ended, while the span is still writable.
 */
export declare class PseudoProfilingSpanProcessor extends OnEndingHookSpanProcessor {
    private readonly _spanProfilingData;
    onStart(span: Span, _context: Context): void;
    onEnding(span: Span): void;
    /**
     * Captures profiling data and sets attributes on the span.
     * Called just before the span is ended, while it's still writable.
     */
    private _captureProfilingData;
}