import { ImportedCompiledCssFile } from "../importing";
/**
 * Given a Compiled CSS file, determine the block-syntax-version for the
 * definition file.
 * @param file - The Compiled CSS file to look up the version number from.
 * @returns The version number found in the definition file.
 */
export declare function determineBlockSyntaxVersion(file: ImportedCompiledCssFile): number;
/**
 * Updates the definition data in a Compiled CSS file to use the current
 * block-syntax-version supported by this version of CSS Blocks. We attempt
 * to make these transformations automatically; however, there are three
 * scenarios we will have to throw an error on if they occur...
 *
 * 1. We can't find the block-syntax-version or parse it into a number.
 * 2. The version is greater than the block-syntax-version supported in
 *    this version of CSS Blocks. (This implies that a later version of
 *    CSS Blocks compiled this file and bumping CSS Blocks may resolve
 *    the issue.)
 * 3. The version is less than the earliest block-syntax-version supported
 *    in this version of CSS Blocks. (This means that a much earlier version
 *    of CSS Blocks compiled the file using some syntax that can't be
 *    automatically upgraded.)
 *
 * @param file - The Compiled CSS file to update.
 * @returns The ImportedCompiledCSSFile with the transformed definition file contents.
 */
export declare function upgradeDefinitionFileSyntax(file: ImportedCompiledCssFile): ImportedCompiledCssFile;
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