[api-extractor] nested import declaration or generics not supported

[dtassone]

Is this a feature or a bug?

• Feature
• Bug

Please describe the actual behavior.

generated import is

export declare const ArrowUpward: import("@material-ui/core/OverridableComponent").OverridableComponent<import("@material-ui/core").SvgIconTypeMap<{}, "svg">>;

Error: The expression contains an import() type, which is not yet supported by API Extractor:

What is the expected behavior?

No error

If this is a bug, please provide the tool version, Node.js version, and OS.

• typescript: 3.9.5
• Tool Version: 7.8.15
• Node Version: 12.18.1
  • Is this a LTS version? Yes
  • Have you tested on a LTS version?
• OS: Mac OS Mojave 10.14.6