/**
 * Specifies the orientation of the text in an annotation.
 */
export declare enum AnnotationTextOrientation {
    /**
     * Horizontal text.
     */
    Horizontal = 0,
    /**
     * Vertical text.
     */
    Vertical = 1,
    /**
     * Oriented along the line.
     */
    AlongLine = 2
}
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