import { NodePath } from '@babel/traverse';
import * as t from '@babel/types';
import { PrimingDiagnostic } from '../types';
import { ModuleMetadata } from '@komaci/common-shared';
/**
 * Invariant function for checking if an getter defined in an external module has only a
 * statement in it, a return statement.
 * @param blockStatement the babel path object for the BlockStatement representing the contents of the getter
 * @param statements the babel path object array for all of the Statements in the getter
 * @returns PrimingDiagnostic of the BlockStatement if the invariant is detected, or undefined if the invariant wasn't found
 */
export declare function checkExternalModuleGetterReturnStatement(blockStatement: NodePath<t.BlockStatement>, statements: NodePath<t.Statement>[]): PrimingDiagnostic | undefined;
/**
 * Invariant function for checking if an render function defined in an external module has only a
 * statement in it, a return statement.
 * @param blockStatement the babel path object for the BlockStatement representing the contents of the render function.
 * @param statements the babel path object array for all of the Statements in the render function.
 * @returns PrimingDiagnostic of the BlockStatement if the invariant is detected, or undefined if the invariant wasn't found
 */
export declare function checkExternalModuleRenderReturnStatement(blockStatement: NodePath<t.BlockStatement>, statements: NodePath<t.Statement>[]): PrimingDiagnostic | undefined;
/**
 * Function to validate the render function, returns a priming diagnost if an invariant is found.
 * @param returnStmt the return satement node
 * @param moduleMetadata the module metadata obj
 * @returns a priming diagnostic or undefined.
 */
export declare function checkRenderFunctionReturnValues(returnStmt: t.ReturnStatement, moduleMetadata: ModuleMetadata): PrimingDiagnostic | undefined;
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