import { IIndentedStringBuilder } from './_types';
/**
 * Class for building strings that will only concatenate them upon calling toString().
 */
export default class IndentedStringBuilder implements IIndentedStringBuilder {
    #private;
    indentationString: string;
    /**
     * Create a new StringBuilder.
     * @param lines
     */
    constructor(indentationLevel: number, ...lines: string[]);
    /**
     * Appends the value to the builder with a new line afterwards.
     * @param value
     */
    appendLine(value: string): void;
    /**
     * Clears all values from the StringBuilder.
     */
    clear(): void;
    /** adds an indent level */
    indent(): void;
    /** Removes the current indent */
    unindent(): void;
    /**
     * Returns a string representation of the StringBuilder.
     */
    toString(): string;
}