feat: Simplify the ConfigureSection functions to support more different usages.

providers/yaml/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>easyconfiguration-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.0.1</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

providers/yaml/src/main/java/cc/carm/lib/configuration/source/yaml/YAMLSource.java

@@ -4,7 +4,6 @@ import cc.carm.lib.configuration.commentable.Commentable;
 import cc.carm.lib.configuration.commentable.CommentableOptions;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.file.FileConfigSource;
-import cc.carm.lib.configuration.source.option.StandardOptions;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import cc.carm.lib.configuration.source.section.MemorySection;
 import cc.carm.lib.yamlcommentupdater.CommentedSection;
@@ -56,7 +55,7 @@ public class YAMLSource
     }
 
     @Override
-    protected YAMLSource self() {
+    protected @NotNull YAMLSource self() {
         return null;
     }
 
@@ -70,11 +69,6 @@ public class YAMLSource
         return Objects.requireNonNull(this.rootSection, "Root section is not initialized.");
     }
 
-    @Override
-    public char separator() {
-        return holder().options().get(StandardOptions.PATH_SEPARATOR);
-    }
-
     public @NotNull LoaderOptions loaderOptions() {
         return holder().options().get(YAMLOptions.LOADER);
     }
@@ -115,7 +109,7 @@ public class YAMLSource
     @Override
     public void save() throws Exception {
         CommentedYAMLWriter writer = new CommentedYAMLWriter(
-                String.valueOf(this.separator()),
+                String.valueOf(this.pathSeparator()),
                 dumperOptions().getIndent(),
                 holder.options().get(CommentableOptions.COMMENT_EMPTY_VALUE)
         );