Strip inaccessible fields in salesforce

To enforce FLS and CRUD in Apex.

ex :

List<Campaign> campaigns = new List<Campaign>{
    new Campaign(Name='Campaign1', BudgetedCost=1000, ActualCost=2000),
    new Campaign(Name='Campaign2', BudgetedCost=4000, ActualCost=1500)
};
insert campaigns;
// Strip fields that are not readable
SObjectAccessDecision decision = Security.stripInaccessible(
    AccessType.READABLE,
    [SELECT Name, BudgetedCost, ActualCost FROM Campaign]
);
// Print stripped records
for (SObject strippedCampaign : decision.getRecords()) {
    System.debug(strippedCampaign); // Does not display ActualCost
}
// Print modified indexes
System.debug(decision.getModifiedIndexes());
// Print removed fields
System.debug(decision.getRemovedFields());
//Lines from output log
//|DEBUG|Campaign:{Name=Campaign1, BudgetedCost=1000, Id=701xx00000011nhAAA}
//|DEBUG|Campaign:{Name=Campaign2, BudgetedCost=4000, Id=701xx00000011niAAA}
//|DEBUG|{0, 1}
//|DEBUG|{Campaign={ActualCost}}

Note :

1. You can use it remove inaccessible fields from sObjects before a DML operation
to avoid exceptions.

2. you can use the stripInaccessible() method to sanitize sObjects that
have been deserialized from an untrusted source.