code: public synchronized void remove(final int statementId) {
          MySQLBinaryStatement binaryStatement = getBinaryStatement(statementId);
          if (null != binaryStatement) {
              statementIdAssigner.remove(binaryStatement.getSql());
              binaryStatements.remove(statementId);
          }
      }
docs: Remove expired cache statement.
  
  @param statementId statement ID