export declare const KnownFeatureFlags: {
    readonly DIMENSION_SUBSET: "dimension-subset";
};
export type KnownFeatureFlag = (typeof KnownFeatureFlags)[keyof typeof KnownFeatureFlags];
/**
 * Returns true if the given feature flag is enabled.
 *
 * Checks two sources in order:
 * 1. The `?terra-features=flag1,flag2` URL parameter
 * 2. The component's `features` attribute (comma-separated string)
 *
 * @example
 * // In a component:
 * isFeatureEnabled(KnownFeatureFlags.DIMENSION_SUBSET, this.features)
 *
 * // Enabled via HTML attribute:
 * <terra-data-subsetter features="dimension-subset"></terra-data-subsetter>
 *
 * // Enabled via URL:
 * https://example.com?terra-features=dimension-subset
 */
export declare function isFeatureEnabled(flag: string, featuresAttr: string | undefined): boolean;