import ts from 'typescript';
export declare function getQuestionToken(node: ts.ParameterDeclaration): ts.Token<ts.SyntaxKind.QuestionToken> | undefined;
export declare function getDotDotDotToken(node: ts.ParameterDeclaration): ts.Token<ts.SyntaxKind.DotDotDotToken> | undefined;
export declare function isRestParameter(node: ts.ParameterDeclaration): boolean;
export declare function isOptional(node: ts.ParameterDeclaration): boolean;