Export getVisitFn function

Author: IvanGoncharov

src/index.js

@@ -171,6 +171,7 @@ export {
   visit,
   visitInParallel,
   visitWithTypeInfo,
+  getVisitFn,
   Kind,
   TokenKind,
   BREAK,

src/language/index.js

@@ -15,7 +15,13 @@ export { createLexer, TokenKind } from './lexer';
 export { parse, parseValue, parseType } from './parser';
 export { print } from './printer';
 export { Source } from './source';
-export { visit, visitInParallel, visitWithTypeInfo, BREAK } from './visitor';
+export {
+  visit,
+  visitInParallel,
+  visitWithTypeInfo,
+  getVisitFn,
+  BREAK,
+} from './visitor';
 
 export type { Lexer } from './lexer';
 export type { ParseOptions } from './parser';

src/language/visitor.js

@@ -357,7 +357,7 @@ export function visitWithTypeInfo(typeInfo, visitor) {
  * Given a visitor instance, if it is leaving or not, and a node kind, return
  * the function the visitor runtime should call.
  */
-function getVisitFn(visitor, kind, isLeaving) {
+export function getVisitFn(visitor, kind, isLeaving) {
   const kindVisitor = visitor[kind];
   if (kindVisitor) {
     if (!isLeaving && typeof kindVisitor === 'function') {