import cpp
import semmle.code.cpp.security.Security
import semmle.code.cpp.security.FlowSources

  class MyFS extends LocalFlowSource { 
    MyFS () {
        exists(ReturnStmt rs |
            rs.getEnclosingFunction().getName() = "get_user_info"
            and this.asExpr() = rs.getExpr()
        )
    }
    override string getSourceType() {
        result = "foo"
    }
  }