private async onCompletionResolve(
 item: LSP.CompletionItem,
 ): Promise<LSP.CompletionItem> {
 const {
 data: { name, type },
 } = item
 const getMarkdownCompletionItem = (doc: string) => ({
 ...item,
 documentation: {
 value: doc,
 kind: 'plaintext' as const
 }
 })
 try {
 if (type === 'executable') {
 const doc = await this.executables.documentation(name)
 return getMarkdownCompletionItem(doc)
 } else if (type === 'builtin') {
 const doc = await Builtins.documentation(name)
 return getMarkdownCompletionItem(doc)
 } else {
 return item
 }
 } catch (error) {
 return item
 }
 }