import { StyleProp, TextStyle } from "react-native";
export declare const calculateRadius: (width: number, height: number, borderRadius: number) => number;
export declare const withPromise: <T extends unknown[]>(fn: (...args: T) => Promise<unknown>) => (...args: T) => void;
export declare const extractStyle: (style: StyleProp<TextStyle>, attribute: keyof TextStyle) => TextStyle[keyof TextStyle] | undefined;
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