public override void OnGUI(Rect position)
        {
            float textHeight = Atr.Contents.Length * LineHeight;
            float boxHeight  = textHeight + Atr.PaddingTop + Atr.PaddingBottom;

            float boxWidth  = position.width;
            float textWidth = boxWidth - Atr.PaddingLeft;

            float boxX  = position.x;
            float textX = boxX + Atr.PaddingLeft;

            float boxY  = position.y + Atr.MarginTop;
            float textY = boxY + Atr.PaddingTop;

            Rect boxRect = new Rect(boxX, boxY, boxWidth, boxHeight);

            Color textColor = EColorConverter.Convert(Atr.TextColor);
            Color boxColor  = EColorConverter.Convert(Atr.BoxColor);

            EditorGUI.DrawRect(boxRect, boxColor);

            GUIStyle labelStyle = Atr.BoldText ? EditorStyles.boldLabel : EditorStyles.label;

            // Remember Olds
            Color oldStyleTextColor = labelStyle.normal.textColor;
            int   oldTextSize       = labelStyle.fontSize;

            // Custom Text Color
            labelStyle.normal.textColor = textColor;
            labelStyle.fontSize         = Atr.FontSize;

            // Header Label
            float curPosY = textY;

            foreach (var text in Atr.Contents)
            {
                Rect curRect = new Rect(textX, curPosY, textWidth, LineHeight);

                EditorGUI.LabelField(curRect, text, labelStyle);
                curPosY += LineHeight;
            }

            // Restore Olds
            labelStyle.normal.textColor = oldStyleTextColor;
            labelStyle.fontSize         = oldTextSize;
        }
 /// <summary>
 /// <para/> EColor -> Color 변환
 /// </summary>
 public static Color Ex_Convert(this EColor eColor)
 => EColorConverter.Convert(eColor);