Notes
In Apex, the ID
data type is used to represent unique identifiers for records in Salesforce. An ID
typically refers to the unique identifier of a Salesforce record, such as an object's primary key.
The length of an ID is 18 digits. In some cases, the length of ID could be 15 Digit as well.
Here's a brief example:
ID recordId = '001XXXXXXXXXXXXXXX';
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