/// <summary>
/// Gets the attributes for a <see cref="CodeAttributeTarget"/> or null.
/// </summary>
/// <param name="key">The target.</param>
/// <returns>The attributes or null.</returns>
public AttributeSetDefinition?this[CodeAttributeTarget key]
{
get => _attrs[(int)key];
/// <summary>
/// Initializes a new <see cref="AttributeSetDefinition"/>.
/// </summary>
/// <param name="target">The target for this set.</param>
/// <param name="attributes">Optional existing list of attributes.</param>
public AttributeSetDefinition(CodeAttributeTarget target, List <AttributeDefinition>?attributes = null)
{
Target = target;
Attributes = attributes ?? new List <AttributeDefinition>();
}
