How to use the sourcegraph.Range function in sourcegraph

function computeRemoveDependencyEdit(
    diag: sourcegraph.Diagnostic,
    doc: sourcegraph.TextDocument,
    edit = new sourcegraph.WorkspaceEdit()
): sourcegraph.WorkspaceEdit {
    const dep = getDiagnosticData(diag)
    const range = findDependencyMatchRange(doc.text, dep.name)
    // TODO!(sqs): assumes dependency key-value is all on one line and only appears once
    edit.delete(
        new URL(doc.uri),
        new sourcegraph.Range(
            range.start.with({ character: 0 }),
            range.end.with({ line: range.end.line + 1, character: 0 })
        )
    )
    return edit
}

if (!inGemSpecsSection) {
            continue
        }

        const DEP_INDENT = '    '
        const TRANSITIVE_DEP_INDENT = '      '
        if (line.startsWith(DEP_INDENT) && !line.startsWith(TRANSITIVE_DEP_INDENT)) {
            // Dependency.
            const m = line.match(/^\s*(.+) \((.+)\)$/)
            if (!m) {
                throw new Error(`invalid Gemfile.lock dependency line ${i}: ${JSON.stringify(line)}`)
            }
            const gemName = m[1]
            const gemVersion = m[2]

            const range = new sourcegraph.Range(
                new sourcegraph.Position(i, '    '.length),
                new sourcegraph.Position(i, line.length)
            )

            // A gem might be listed as an indirect dep before being listed as a direct dep.
            let gem = byName.get(gemName)
            if (gem) {
                gem.direct = true
                gem.range = range
                gem.version = gemVersion
            } else {
                gem = {
                    name: gemName,
                    version: gemVersion,
                    direct: true,
                    range,

function createWorkspaceEditFromESLintFix(
    doc: sourcegraph.TextDocument,
    fix: Rule.Fix,
    edit = new sourcegraph.WorkspaceEdit()
): sourcegraph.WorkspaceEdit {
    edit.replace(
        new URL(doc.uri),
        new sourcegraph.Range(doc.positionAt(fix.range[0]), doc.positionAt(fix.range[1])),
        fix.text
    )
    return edit
}

export const editPackageJson = (
    doc: sourcegraph.TextDocument,
    operations: { path: Segment[]; value: any }[],
    workspaceEdit = new sourcegraph.WorkspaceEdit()
): sourcegraph.WorkspaceEdit => {
    for (const op of operations) {
        const edits = setProperty(doc.text!, op.path, op.value, PACKAGE_JSON_FORMATTING_OPTIONS)
        for (const edit of edits) {
            workspaceEdit.replace(
                new URL(doc.uri),
                new sourcegraph.Range(doc.positionAt(edit.offset), doc.positionAt(edit.offset + edit.length)),
                edit.content
            )
        }
    }
    return workspaceEdit
}

export const editPackageJson = (
    doc: sourcegraph.TextDocument,
    operations: { path: Segment[]; value: any }[],
    workspaceEdit = new sourcegraph.WorkspaceEdit()
): sourcegraph.WorkspaceEdit => {
    for (const op of operations) {
        const edits = setProperty(doc.text!, op.path, op.value, PACKAGE_JSON_FORMATTING_OPTIONS)
        for (const edit of edits) {
            workspaceEdit.replace(
                new URL(doc.uri),
                new sourcegraph.Range(doc.positionAt(edit.offset), doc.positionAt(edit.offset + edit.length)),
                edit.content
            )
        }
    }
    return workspaceEdit
}

function findTokenRanges(text: string, pattern: RegExp): { range: sourcegraph.Range; token: string }[] {
    const results: { range: sourcegraph.Range; token: string }[] = []
    for (const [i, line] of text.split('\n').entries()) {
        const match = pattern.exec(line)
        if (match && match[2]) {
            const startCharacter = match.index + match[1].length
            results.push({
                range: new sourcegraph.Range(i, startCharacter, i, startCharacter + match[2].length),
                token: match[2],
            })
        }
    }
    return results
}

function nodeToLocation(node: LocationConnectionNode): sourcegraph.Location {
    return {
        uri: new sourcegraph.URI(
            `git://${node.resource.repository.name}?${node.resource.commit.oid}#${node.resource.path}`
        ),
        range: new sourcegraph.Range(
            node.range.start.line,
            node.range.start.character,
            node.range.end.line,
            node.range.end.character
        ),
    }
}

function rangeForLintMessage(doc: sourcegraph.TextDocument, m: Linter.LintMessage): sourcegraph.Range {
    if (m.line === undefined && m.column === undefined) {
        return new sourcegraph.Range(0, 0, 1, 0)
    }
    const start = new sourcegraph.Position(m.line - 1, m.column - 1)
    let end: sourcegraph.Position
    if (m.endLine === undefined && m.endColumn === undefined) {
        const wordRange = doc.getWordRangeAtPosition(start)
        end = wordRange ? wordRange.end : start
    } else {
        end = new sourcegraph.Position(m.endLine - 1, m.endColumn - 1)
    }
    return new sourcegraph.Range(start, end)
}

function duplicationRange({ start, end }: { start: ITokenLocation; end: ITokenLocation }): sourcegraph.Range {
    return new sourcegraph.Range(
        new sourcegraph.Position(start.line, start.column || 0),
        new sourcegraph.Position(end.line, end.column || 0)
    )
}

function rangeForLintMessage(doc: sourcegraph.TextDocument, m: Linter.LintMessage): sourcegraph.Range {
    if (m.line === undefined && m.column === undefined) {
        return new sourcegraph.Range(0, 0, 1, 0)
    }
    const start = new sourcegraph.Position(m.line - 1, m.column - 1)
    let end: sourcegraph.Position
    if (m.endLine === undefined && m.endColumn === undefined) {
        const wordRange = doc.getWordRangeAtPosition(start)
        end = wordRange ? wordRange.end : start
    } else {
        end = new sourcegraph.Position(m.endLine - 1, m.endColumn - 1)
    }
    return new sourcegraph.Range(start, end)
}