@type t() :: %Figler.Schema.AssetId{
  asset_ref: Figler.Schema.AssetRef.t() | nil,
  guid: Figler.Schema.GUID.t() | nil,
  state_group_id: Figler.Schema.StateGroupId.t() | nil,
  style_id: Figler.Schema.StyleId.t() | nil,
  symbol_id: Figler.Schema.SymbolId.t() | nil,
  variable_id: Figler.Schema.VariableID.t() | nil,
  variable_set_id: Figler.Schema.VariableSetID.t() | nil
}