←
syncable
ideal
•
library
•
channels
• input
output
→
interface
input
[covariant
value
element
]
extends
closeable
,
syncable
not yet implemented readonly boolean
is available
not yet implemented readonly nonnegative
available
immutable
list
[
element
]
read
(
nonnegative
max
)
←
syncable
ideal
•
library
•
channels
• input
output
→