/** A list of valid environments */
export declare const ENVIRONMENTS: readonly ["bench", "debug", "prod"];
/**
 * Defines the environment in whcih instrumentation in running. Traces can
 * be constrained to run only in certain environments.
 */
export type Environment = (typeof ENVIRONMENTS)[number];
/**
 * Takes an environment and returns true if it is valid for use i.e.
 * 'should this trace be executed?
 */
export type EnvironmentFilter = (env: Environment) => boolean;
/**
 * @param treshold
 * @returns An environnment filter that returns true if the environment is greater
 * than or equal to the given threshold.
 */
export declare const envThresholdFilter: (treshold: Environment) => EnvironmentFilter;
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