/// <summary>
/// Find a serialized parameter override using an expression instead of a string. This is
/// safer as it helps avoiding typos and make code refactoring easier.
/// </summary>
/// <typeparam name="TValue">The serialized value type</typeparam>
/// <param name="expr">The expression to parse to reach the parameter override</param>
/// <returns>A <see cref="SerializedParameterOverride"/> or <c>null</c> if none was
/// found</returns>
/// <example>
/// <code>
/// [Serializable]
/// public class MyEffect : PostProcessEffectSettings
/// {
/// public FloatParameter myParameter = new FloatParameter { value = 1f };
/// }
///
/// [PostProcessEditor(typeof(MyEffect))]
/// public class MyEffectEditor : PostProcessEffectEditor<MyEffect>
/// {
/// SerializedParameterOverride m_MyParameter;
///
/// public override void OnEnable()
/// {
/// m_MyParameter = FindParameterOverride(x => x.myParameter);
/// }
/// }
/// </code>
/// </example>
/// <seealso cref="SerializedParameterOverride"/>
protected SerializedParameterOverride FindParameterOverride <TValue>(Expression <Func <T, TValue> > expr)
{
var property = serializedObject.FindProperty(RuntimeUtilities.GetFieldPath(expr));
var attributes = RuntimeUtilities.GetMemberAttributes(expr);
return(new SerializedParameterOverride(property, attributes));
}