import { postcss } from "opticss";
import { Block } from "../../BlockTree";
import { Configuration } from "../../configuration";
/**
 * For each `composes` property found in the passed ruleset, track the foreign
 * block. If block is not found, throw.
 * @param block  Block object being processed
 * @param sourceFile  Source file name, used for error output.
 * @param rule Ruleset to crawl
 */
export declare function composeBlock(configuration: Configuration, root: postcss.Root, block: Block, sourceFile: string): void;
//# sourceMappingURL=composes-block.d.ts.map