.class public interface abstract Landroidx/constraintlayout/solver/state/Reference; .super Ljava/lang/Object; .source "Reference.java" # virtual methods .method public abstract apply()V .end method .method public abstract getConstraintWidget()Landroidx/constraintlayout/solver/widgets/ConstraintWidget; .end method .method public abstract getKey()Ljava/lang/Object; .end method .method public abstract setConstraintWidget(Landroidx/constraintlayout/solver/widgets/ConstraintWidget;)V .end method .method public abstract setKey(Ljava/lang/Object;)V .end method