@Override
    public String getName() {
        return "expression";
    }
The simplified version of the SEPL parsing implementation does not support write function execution.

@see SimpleEvaluationContext
@see DataBindingPropertyAccessor#forReadOnlyAccess()
shenyu-plugin/shenyu-plugin-mock/src/main/java/org/apache/shenyu/plugin/mock/generator/ExpressionGenerator.java