インスペクタのパラメータの名前を簡単に変えるエディタ拡張

using UnityEngine;

public class CustomLabelAttribute : PropertyAttribute
{
    public readonly string Value;

    public CustomLabelAttribute(string value)
    {
        Value = value;
    }
}

using UnityEditor;
using UnityEngine;

[CustomPropertyDrawer(typeof(CustomLabelAttribute))]
public class CustomLabelDrawer : PropertyDrawer
{
        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            var newLabel = attribute as CustomLabelAttribute;
            EditorGUI.PropertyField(position, property, new GUIContent(newLabel.Value), true);
        }

        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            return EditorGUI.GetPropertyHeight(property, true);
        }
}

using UnityEngine;

public class UseCustomLabelAttribute : MonoBehaviour
{
    [CustomLabel("カウント")]
    public int Count;
}