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There are 12 error identifiers in the instanceof.* group:

• Instanceof check will always evaluate to false based on the inferred types.

• Instanceof check will always evaluate to true, making it redundant.

• Instanceof check references a deprecated class.

• Instanceof check references a deprecated enum.

• Instanceof check references a deprecated interface.

• Instanceof check references a deprecated trait.

• Instanceof check references an internal class from another package.

• Instanceof check references an internal enum from another package.

• Instanceof check references an internal interface from another package.

• Instanceof check references an internal trait from another package.

• Right-hand side of instanceof is not a string or object.

• Instanceof check against a trait always evaluates to false.