Remove the value for the current thread.
the value for the current thread or None
Get the value for the current thread or
if none.op
Get the value for the current thread or
if none.
op
the updated value
the existing value or op
Set the value for the current thread, replacing the existing value, if any.
Set the value for the current thread, replacing the existing value, if any.
the new value
A value per thread wrapped in SoftReferences, which allows it to be reclaimed by garbage-collection when needed.