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## jif.extension
Class JifProcedureDeclExt_c.ConstraintVarianceLabelChecker

    java.lang.Object
      jif.types.LabelSubstitution
          jif.extension.JifProcedureDeclExt_c.ConstraintVarianceLabelChecker

Enclosing class:
  JifProcedureDeclExt_c

    protected static class JifProcedureDeclExt_c.ConstraintVarianceLabelChecker

extends LabelSubstitution

Checker to ensure that labels do not use covariant labels in the wrong places

Method Summary
`Label` | `substLabel(Label L)`

Methods inherited from class jif.types.LabelSubstitution
`popLabel, pushLabel, recurseIntoChildren, stackContains, substAccessPath, substPolicy, substPrincipal`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### substLabel

    public Label substLabel(Label L)
                     throws polyglot.types.SemanticException

  Overrides:
    `substLabel` in class `LabelSubstitution`
  Throws:
    `polyglot.types.SemanticException`

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