Sets the value of this variable (if unset).
Sets the value of this variable (if unset) with the value of the supplied variable.
Retrieves the value of variable, throws a DataFlowVariableException if it times out.
Retrieves the value of variable, throws a DataFlowVariableException if it times out.
JavaAPI.
JavaAPI. Sets the value of this variable (if unset) with the value of the supplied variable.
JavaAPI.
JavaAPI. Sets the value of this variable (if unset) with the value of the supplied variable.
Superceeded by Future and CompletableFuture as of 1.1