Minor: hasTopLevelCallables rename

compiler/psi/src/org/jetbrains/kotlin/psi/KtFile.kt

@@ -48,7 +48,7 @@ open class KtFile(viewProvider: FileViewProvider, val isCompiled: Boolean) :
     private var isScript: Boolean? = null
 
     @Volatile
-    private var hasTopLeveCallables: Boolean? = null
+    private var hasTopLevelCallables: Boolean? = null
 
     @Volatile
     private var pathCached: String? = null
@@ -181,14 +181,14 @@ open class KtFile(viewProvider: FileViewProvider, val isCompiled: Boolean) :
         @Suppress("RemoveExplicitSuperQualifier")
         super<PsiFileBase>.clearCaches()
         isScript = null
-        hasTopLeveCallables = null
+        hasTopLevelCallables = null
         pathCached = null
     }
 
     fun isScript(): Boolean = stub?.isScript() ?: isScriptByTree
 
     fun hasTopLevelCallables(): Boolean {
-        hasTopLeveCallables?.let { return it }
+        hasTopLevelCallables?.let { return it }
 
         val result = declarations.any {
             (it is KtProperty ||
@@ -197,7 +197,7 @@ open class KtFile(viewProvider: FileViewProvider, val isCompiled: Boolean) :
                     it is KtTypeAlias) && !it.hasExpectModifier()
         }
 
-        hasTopLeveCallables = result
+        hasTopLevelCallables = result
         return result
     }