is " has no compiler-defined `deep_twin' or `is_deep_equal' because the corresponding allocated size is not part of the NATIVE_ARRAY object. The client class of this NATIVE_ARRAY type is supposed to use a `capacity' attribute which contains the corresponding number of allocated items (see STRING or ARRAY for example)."
constant attribute
{}
agent foo(?) But, keep in mind that an open operand can also be some type mark inside curly brackets like in: agent foo({INTEGER}) Finally, an OPEN_OPERAND object can also be used when the target itself is open as in: agent {FOO}.barSee also AGENT_CREATION and CLOSED_OPERAND.