/**
 * Options used to control the formatting
 */
export interface XmlSerializerOptions {
    beautify?: boolean;
    indentString?: string;
    mixedContentElements?: string[];
}
export declare class XmlSerializer {
    constructor();
    /**
     * Serialze xml document to string.
     * @param document the document
     * @param options can be used to activate beautifying.
     */
    serializeToString(document: Document, options?: XmlSerializerOptions): string;
    /**
     * Main format method that does all the work.
     * Outputs a node to the outputbuffer.
     * @param node the node to be formatted.
     * @param options
     * @param buf outputbuffer, new output will be appended to this array.
     * @param indentLevel Lever of indentation for formatted output.
     * @param partOfMixedContent true, if node is a subelement of an element containind mixed content.
     * @param visibleNamespaces
     */
    private doSerializeToString(node, options, buf, indentLevel, partOfMixedContent, visibleNamespaces);
    private needNamespaceDefine(node, visibleNamespaces);
    private _xmlEncoder(c);
    private outputIndented(options, buf, indentLevel, ...outputParts);
    private indentationString(options, indentLevel);
    /**
     * Test, wether tagName is an element containing mixed content.
     * @param tagName
     * @param options
     */
    private isMixedContentElement(tagName, options);
    private containsOnlyWhiteSpace(text);
}