diff --git a/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/AutoPipelineDescriptor.kt b/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/AutoPipelineDescriptor.kt
index b7acdb7..b7299fd 100644
--- a/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/AutoPipelineDescriptor.kt
+++ b/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/AutoPipelineDescriptor.kt
@@ -101,7 +101,7 @@ class AutoPipelineClassDescriptor(
 
     val entityMethods = elements.getAllMembers(entityElement)
         .filterNotNull()
-        .filterIsInstance(ExecutableElement::class.java)
+        .filterIsInstance<ExecutableElement>()
         .filter {
             it.kind == ElementKind.METHOD && it.modifiers.contains(PUBLIC) && it.modifiers.contains(ABSTRACT)
         }
diff --git a/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/generator/AbstractGenerator.kt b/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/generator/AbstractGenerator.kt
index d846f5f..0addda6 100644
--- a/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/generator/AbstractGenerator.kt
+++ b/auto-pipeline-processor/src/main/java/com/foldright/auto/pipeline/processor/generator/AbstractGenerator.kt
@@ -12,13 +12,13 @@ import javax.lang.model.type.TypeVariable
 abstract class AbstractGenerator(private val desc: AutoPipelineClassDescriptor) {
 
     companion object {
-        private const val indent: String = "    "
+        private const val INDENT: String = "    "
     }
 
     protected fun javaFileBuilder(packageName: String, typeSpec: TypeSpec): JavaFile.Builder =
         JavaFile.builder(packageName, typeSpec)
             .skipJavaLangImports(true)
-            .indent(indent)
+            .indent(INDENT)
 
 
     protected fun genPipelineOverrideMethods(statement: (AutoPipelineOperatorsDescriptor) -> CodeBlock): List<MethodSpec> =