ocumentation-only concept defining the behavior of an object capable of zero-copy-serializing,...">Struct_builder</a> may stipulate that such an as-if-default-cted <a class="el" href="structipc_1_1transport_1_1struc_1_1Struct__builder_1_1Config.html" title="Copy-ctible, copy-assignable, default-ctible type – informally, cheaply copyable and likely an aggreg...">Config</a> being passed to <a class="el" href="classipc_1_1transport_1_1struc_1_1Struct__builder.html" title="A documentation-only concept definin