slot-exists-p
object slot-name => generalized-boolean
object---an object.
slot-name---a symbol.
generalized-boolean---a generalized boolean.
Returns true if the object has a slot named slot-name.
defclass, defstruct
section defclass [Macro] , section slot-missing [Standard Generic Function]
Although no implementation is required to do so, implementors are strongly encouraged to implement the function slot-exists-p using the function slot-exists-p-using-class described in the Metaobject Protocol.
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