// 清空序列的变量
public void ClearSequenceVariables(ISequenceFlowContainer sequence)
{
string nameRegex = CoreUtils.GetExactVariableNameRegex(sequence, _context.SessionId);
Regex varRegex = new Regex(nameRegex);
List <string> variableNames = new List <string>(_variables.Keys);
foreach (string variableName in variableNames)
{
if (varRegex.IsMatch(variableName))
{
// TODO 只将该值配置为null，不会删除变量定义
_variables[variableName] = null;
}
}
}