declare module 'source-map-js' { 
    export interface StartOfSourceMap {
        file?: string;
        sourceRoot?: string;
    }

    export interface RawSourceMap extends StartOfSourceMap {
        version: string;
        sources: string[];
        names: string[];
        sourcesContent?: string[];
        mappings: string;
    }

    export interface Position {
        line: number;
        column: number;
    }

    export interface LineRange extends Position {
        lastColumn: number;
    }

    export interface FindPosition extends Position {
        // SourceMapConsumer.GREATEST_LOWER_BOUND or SourceMapConsumer.LEAST_UPPER_BOUND
        bias?: number;
    }

    export interface SourceFindPosition extends FindPosition {
        source: string;
    }

    export interface MappedPosition extends Position {
        source: string;
        name?: string;
    }

    export interface MappingItem {
        source: string;
        generatedLine: number;
        generatedColumn: number;
        originalLine: number;
        originalColumn: number;
        name: string;
    }

    export class SourceMapConsumer {
        static GENERATED_ORDER: number;
        static ORIGINAL_ORDER: number;

        static GREATEST_LOWER_BOUND: number;
        static LEAST_UPPER_BOUND: number;

        constructor(rawSourceMap: RawSourceMap);
        computeColumnSpans(): void;
        originalPositionFor(generatedPosition: FindPosition): MappedPosition;
        generatedPositionFor(originalPosition: SourceFindPosition): LineRange;
        allGeneratedPositionsFor(originalPosition: MappedPosition): Position[];
        hasContentsOfAllSources(): boolean;
        sourceContentFor(source: string, returnNullOnMissing?: boolean): string;
        eachMapping(callback: (mapping: MappingItem) => void, context?: any, order?: number): void;
    }

    export interface Mapping {
        generated: Position;
        original: Position;
        source: string;
        name?: string;
    }

    export class SourceMapGenerator {
        constructor(startOfSourceMap?: StartOfSourceMap);
        static fromSourceMap(sourceMapConsumer: SourceMapConsumer): SourceMapGenerator;
        addMapping(mapping: Mapping): void;
        setSourceContent(sourceFile: string, sourceContent: string): void;
        applySourceMap(sourceMapConsumer: SourceMapConsumer, sourceFile?: string, sourceMapPath?: string): void;
        toString(): string;
    }

    export interface CodeWithSourceMap {
        code: string;
        map: SourceMapGenerator;
    }

    export class SourceNode {
        constructor();
        constructor(line: number, column: number, source: string);
        constructor(line: number, column: number, source: string, chunk?: string, name?: string);
        static fromStringWithSourceMap(code: string, sourceMapConsumer: SourceMapConsumer, relativePath?: string): SourceNode;
        add(chunk: string): void;
        prepend(chunk: string): void;
        setSourceContent(sourceFile: string, sourceContent: string): void;
        walk(fn: (chunk: string, mapping: MappedPosition) => void): void;
        walkSourceContents(fn: (file: string, content: string) => void): void;
        join(sep: string): SourceNode;
        replaceRight(pattern: string, replacement: string): SourceNode;
        toString(): string;
        toStringWithSourceMap(startOfSourceMap?: StartOfSourceMap): CodeWithSourceMap;
    }
}

declare module 'source-map-js/lib/source-map-generator' {
    import { SourceMapGenerator } from 'source-map-js'
    export { SourceMapGenerator }
}

declare module 'source-map-js/lib/source-map-consumer' {
    import { SourceMapConsumer } from 'source-map-js'
    export { SourceMapConsumer }
}

declare module 'source-map-js/lib/source-node' {
    import { SourceNode } from 'source-map-js'
    export { SourceNode }
}