import type { RichTextBlock, AdaptiveElement } from '../models.js';
import { HorizontalAlignment, Spacing } from '../enums.js';
import { TextRunBuilder } from './TextRunBuilder.js';
/** Fluent builder for {@link RichTextBlock} elements. */
export declare class RichTextBlockBuilder {
    private readonly richText;
    /** Sets the unique identifier. @param id The unique identifier. @returns The builder instance for method chaining. */
    withId(id: string): this;
    /** Sets the horizontal alignment of the text block. @param alignment The horizontal alignment. @returns The builder instance for method chaining. */
    withHorizontalAlignment(alignment: HorizontalAlignment): this;
    /** Sets the spacing above the element. @param spacing The spacing value. @returns The builder instance for method chaining. */
    withSpacing(spacing: Spacing): this;
    /** Sets whether a separator line is displayed above the element. @param separator True to show a separator. @returns The builder instance for method chaining. */
    withSeparator(separator?: boolean): this;
    /** Sets whether the element is visible. @param isVisible True to show the element. @returns The builder instance for method chaining. */
    withIsVisible(isVisible: boolean): this;
    /** Sets the height of the element. @param height The height ('auto' or 'stretch'). @returns The builder instance for method chaining. */
    withHeight(height: string): this;
    /** Sets the fallback behavior when the element is unsupported. @param fallback The fallback value ('drop' or an element). @returns The builder instance for method chaining. */
    withFallback(fallback: 'drop' | AdaptiveElement): this;
    /** Sets the feature requirements for the element. @param key The feature name. @param version The minimum required version. @returns The builder instance for method chaining. */
    withRequires(key: string, version: string): this;
    /** Sets whether content should be laid out right-to-left. @param rtl True for RTL. @returns The builder instance for method chaining. */
    withRtl(rtl?: boolean): this;
    /** Adds a plain text string as an inline. @param text The text to add. @returns The builder instance for method chaining. */
    addText(text: string): this;
    /** Adds a formatted TextRun inline. @param configure A callback to configure the TextRunBuilder. @returns The builder instance for method chaining. */
    addTextRun(configure: (b: TextRunBuilder) => void): this;
    /** Builds and returns the configured RichTextBlock. @returns The configured RichTextBlock instance. */
    build(): RichTextBlock;
}
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