public Procedure<TEnvironment> getProcedure(final long procId) {
    return procedures.get(procId);
  }
Send an abort notification to the specified procedure. Depending on the procedure
implementation, the abort can be considered or ignored.
@param procId                the procedure to abort
@param mayInterruptIfRunning if the proc completed at least one step, should it be aborted?
@return true if the procedure exists and has received the abort, otherwise false.
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java