Tests whether an object (entity) is a member of a selection set
An entity name.
A selection set.
ssmemb returns the entity name. If ename is not a member, ssmemb returns nil.If ename is a member of ss,
e2 is a member of selection set ss, while entity name e1 is not a member of ss:In the following examples, entity name
Command: (ssmemb e2 ss)
<Entity name: 1d62d68>
Command: (ssmemb e1 ss)