import { TextMapPropagator } from '@opentelemetry/api';
import { ResourceDetector } from '@opentelemetry/resources';
import { SpanProcessor } from '@opentelemetry/sdk-trace-base';
export declare function getResourceDetectorsFromEnv(): Array<ResourceDetector>;
export declare function filterBlanksAndNulls(list: string[]): string[];
export declare function getOtlpProtocolFromEnv(): string;
export declare function getSpanProcessorsFromEnv(): SpanProcessor[];
/**
 * Get a propagator as defined by environment variables
 */
export declare function getPropagatorFromEnv(): TextMapPropagator | null | undefined;
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