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Error Identifiers: closure.*

There are 4 error identifiers in the closure.* group:

• closure.unusedUse
  Variable imported in the closure's use clause is never used.
• closure.useDuplicate non-ignorable
  Closure's use clause imports a variable that conflicts with a parameter name.
• closure.useSuperGlobal
  Superglobal variable is used in a closure use clause, which is not allowed.
• closure.useThis
  Closure unnecessarily imports $this via the use clause.