Update convenience methods

src/main/java/net/minestom/server/utils/binary/BinaryReader.java

@@ -126,6 +126,10 @@ public class BinaryReader extends InputStream {
         return readSizedString(Integer.MAX_VALUE);
     }
 
+    public @Nullable String readNullableSizedString() {
+        return readNullable(this::readSizedString);
+    }
+
     public byte[] readBytes(int length) {
         byte[] bytes = new byte[length];
         buffer.get(bytes);
@@ -206,7 +210,7 @@ public class BinaryReader extends InputStream {
     }
 
     public @Nullable Component readNullableComponent() {
-        return readBoolean() ? readComponent() : null;
+        return readNullable(this::readComponent);
     }
 
     public Component readComponent() {
@@ -303,4 +307,8 @@ public class BinaryReader extends InputStream {
         //buffer.get(startingPosition, output);
         return output;
     }
+
+    public <T> @Nullable T readNullable(Supplier<T> reader) {
+        return readBoolean() ? reader.get() : null;
+    }
 }

src/main/java/net/minestom/server/utils/binary/BinaryWriter.java

@@ -72,12 +72,7 @@ public class BinaryWriter extends OutputStream {
     }
 
     public void writeNullableComponent(@Nullable Component component) {
-        if (component == null) {
-            writeBoolean(false);
-        } else {
-            writeBoolean(true);
-            writeComponent(component);
-        }
+        writeNullable(component, this::writeComponent);
     }
 
     /**
@@ -201,6 +196,10 @@ public class BinaryWriter extends OutputStream {
         writeBytes(bytes);
     }
 
+    public void writeNullableSizedString(@Nullable String string) {
+        writeNullable(string, this::writeSizedString);
+    }
+
     /**
      * Writes a null terminated string to the buffer. This method adds the null character
      * to the end of the string before writing.
@@ -336,11 +335,15 @@ public class BinaryWriter extends OutputStream {
     }
 
     public void writeNullable(@Nullable Writeable writeable) {
-        if (writeable == null) {
+        writeNullable(writeable, this::write);
+    }
+
+    public <T> void writeNullable(T object, Consumer<T> writer) {
+        if (object == null) {
             writeBoolean(false);
         } else {
             writeBoolean(true);
-            write(writeable);
+            writer.accept(object);
         }
     }