installed and exists is the same for FSExtensions

src/backend/UpdateManger.ts

@@ -93,7 +93,6 @@ abstract class Extension<Status extends SharedStatus>{
 
 export type FSStatus = SharedStatus & {
     prefix: string 
-    exists: boolean
     empty: boolean
 }
 
@@ -123,14 +122,14 @@ export abstract class FSExtension<Status extends FSStatus> extends Extension<FSS
     }
 
     public async isEmpty(): Promise<boolean>{
-        if (!this.exists) return false
+        if (!this.isInstalled) return false
         else {
             const files = await fs.readdir(this.prefix)
             return files.length === 0
         }
     }
 
-    public async exists(): Promise<boolean>{
+    public async isInstalled(): Promise<boolean>{
         try {
             await fs.access(path.resolve(this.prefix, this.name))
             return true
@@ -157,7 +156,6 @@ export class NPMExtension extends FSExtension<NPMStatus>{
     public async status(): Promise<NPMStatus> {
 
         const empty = this.isEmpty()
-        const exists = this.exists()
         const i = this.isInstalled()
         const o = this.isOutdated()
         const n = this.name