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node_modules/styled-jsx/css.d.ts

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+// Definitions by: @types/styled-jsx <https://www.npmjs.com/package/@types/styled-jsx>
+
+declare module 'styled-jsx/css' {
+  function css(chunks: TemplateStringsArray, ...args: any[]): JSX.Element
+  namespace css {
+    export function global(
+      chunks: TemplateStringsArray,
+      ...args: any[]
+    ): JSX.Element
+    export function resolve(
+      chunks: TemplateStringsArray,
+      ...args: any[]
+    ): { className: string; styles: JSX.Element }
+  }
+  export = css
+}