how do u rescale a mob

Bro i checked almost every single forum post with rescaling mobs and couldnt find my answer i check "How to Re-Scale a mob" post and found absolutly nothing exept for somone saying u have to use a custom code snippet, soooo i copy exactly line to line what he did and it gave me

 C:\Users\light\MCreatorWorkspaces\horror_mods_ye\src\main\java\net\mcreator\horrormodsye\procedures\TheMythOnInitialEntitySpawnProcedure.java:7: error: ';' expected public void render(MatrixStack matrixStack, IVertexBuilder buffer, int packedLight, int packedOverlay, float red, float green, float blue, float alpha) {
^
i dont think i did anything wrong and even re checked the screenshot please help ty