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type_annotate_public_apis

Missing type annotation on a public API.

Description

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The analyzer produces this diagnostic when the declaration of part of the public API of a package doesn't have explicit type annotations.

Example

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The following code produces this diagnostic because the function f doesn't have an explicit return type and the parameters x and y don't have explicit types:

dart
f(x, y) => '';

Common fixes

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Add type annotations to the API:

dart
String f(int x, int y) => '';