import type * as t from '@babel/types';
export declare function tsTypeAnnotation(typeAnnotation: t.TSType): t.TSTypeAnnotation;
export declare function isTSTypeAnnotation(node: t.Node | null | undefined): node is t.TSTypeAnnotation;
export declare function assertTSTypeAnnotation(node: t.Node | null | undefined): asserts node is t.TSTypeAnnotation;
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