A bit of documentation and cleanup

Author: qwwdfsad

src/main/kotlin/api/AsmMetadataLoading.kt

@@ -54,11 +54,6 @@ fun ClassNode.isDefaultImpls(metadata: KotlinClassMetadata?) = isInner() && name
 
 fun ClassNode.findAnnotation(annotationName: String, includeInvisible: Boolean = false) =
     findAnnotation(annotationName, visibleAnnotations, invisibleAnnotations, includeInvisible)
-fun MethodNode.findAnnotation(annotationName: String, includeInvisible: Boolean = false) =
-    findAnnotation(annotationName, visibleAnnotations, invisibleAnnotations, includeInvisible)
-fun FieldNode.findAnnotation(annotationName: String, includeInvisible: Boolean = false) =
-    findAnnotation(annotationName, visibleAnnotations, invisibleAnnotations, includeInvisible)
-
 operator fun AnnotationNode.get(key: String): Any? = values.annotationValue(key)
 
 private fun List<Any>.annotationValue(key: String): Any? {

src/main/kotlin/api/KotlinMetadataSignature.kt

@@ -7,7 +7,7 @@ package kotlinx.validation.api
 
 import kotlinx.metadata.jvm.*
 import kotlinx.validation.*
-import org.objectweb.asm.Opcodes
+import org.objectweb.asm.*
 import org.objectweb.asm.tree.*
 
 @ExternalApi // Only name is part of the API, nothing else is used by stdlib
@@ -94,6 +94,12 @@ internal fun MethodNode.alternateDefaultSignature(className: String): JvmMethodS
 }
 
 fun MethodNode.toMethodBinarySignature(
+    /*
+     * Extra annotations are:
+     * * Annotations from the original method for synthetic `$default` method
+     * * Annotations from getter, setter or field for synthetic `$annotation` method
+     * * Annotations from a field for getter and setter
+     */
     extraAnnotations: List<AnnotationNode>,
     alternateDefaultSignature: JvmMethodSignature?
 ): MethodBinarySignature {

src/main/kotlin/api/KotlinSignaturesLoading.kt

@@ -74,8 +74,10 @@ public fun Sequence<InputStream>.loadApiFromJvmClasses(visibilityFilter: (String
                     val annotationHolders =
                         mVisibility?.members?.get(JvmMethodSignature(it.name, it.desc))?.propertyAnnotation
                     val foundAnnotations = ArrayList<AnnotationNode>()
-                    foundAnnotations += fields.annotationsFor(annotationHolders?.field)
-                    foundAnnotations += methods.annotationsFor(annotationHolders?.method)
+                    if (annotationHolders != null) {
+                        foundAnnotations += fields.annotationsFor(annotationHolders.field)
+                        foundAnnotations += methods.annotationsFor(annotationHolders.method)
+                    }
 
                     /**
                      * For synthetic $default methods, pull the annotations from the corresponding method