SONARJAVA-5238 Clarify that serialization applies only to non-static fields. #4950
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https://sonarsource.atlassian.net/browse/SONARJAVA-5238
Messages to make fields serializable or transient are created only for non-static fields. We make this explicit to mildly suggest making a field static as a fix for the problem.
An alternative is to change the message to "Make fieldName serializable, transient, or static", but it might be confusing why we suggest making a field static (often, it will not be possible).