Get [Space] Attribute from SerializedProperty

UnityEditor.GetPropertyAttribute.cs

// source: https://forum.unity.com/threads/serialiedproperty-check-if-it-has-a-propertyattribute.436103/
private static T GetPropertyAttribute<T>(SerializedProperty prop, bool inherit) where T : PropertyAttribute
{
    if (prop == null)
        return null;
    

    Type t = prop.serializedObject.targetObject.GetType();

    FieldInfo f = null;
    PropertyInfo p = null;
    foreach (var name in prop.propertyPath.Split('.')) {
        f = t.GetField(name, (BindingFlags)(-1));

        if (f == null) {
            p = t.GetProperty(name, (BindingFlags)(-1));
            if (p == null) {
                return null;
            }
            t = p.PropertyType;
        } else {
            t = f.FieldType;
        }
    }

    T[] attributes;

    if (f != null) {
        attributes = f.GetCustomAttributes(typeof(T), inherit) as T[];
    } else if (p != null) {
        attributes = p.GetCustomAttributes(typeof(T), inherit) as T[];
    } else {
        return null;
    }

    return (attributes.Length > 0)? attributes[0] : null;
}