import type * as t from '@babel/types';
export declare function mixedTypeAnnotation(): t.MixedTypeAnnotation;
export declare function isMixedTypeAnnotation(node: t.Node | null | undefined): node is t.MixedTypeAnnotation;
export declare function assertMixedTypeAnnotation(node: t.Node | null | undefined): asserts node is t.MixedTypeAnnotation;
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