fix: replace ts-ignore by proper types

Author: Loïc Mangeonjean

src/tools.ts

@@ -156,8 +156,7 @@ export function lockCodeWithoutDecoration (
 }
 
 export function hideCodeWithoutDecoration (editor: monaco.editor.IStandaloneCodeEditor, decorations: string[]): () => void {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  let otherHiddenAreas: monaco.IRange[] = (editor as any)._getViewModel()._lines.getHiddenAreas()
+  let otherHiddenAreas: monaco.IRange[] = editor._getViewModel()?.getHiddenAreas() ?? []
   function getHiddenAreas () {
     const model = editor.getModel()!
 

src/types/monaco.d.ts

@@ -6,6 +6,10 @@ declare module 'monaco-editor' {
             // This method is internal and is supposed to be used by the folding feature
             // We still use it to hide parts of the code in the `hideCodeWithoutDecoration` function
             setHiddenAreas(ranges: IRange[]): void
+
+            _getViewModel(): {
+                getHiddenAreas(): IRange[]
+            } | undefined
         }
     }
 }