@Nullable
    private static Boolean getBooleanEqualsTarget(PsiExpression arg) {
      // Boolean.TRUE::equals or x -> Boolean.TRUE.equals(x)
      arg = skipParenthesizedExprDown(arg);
      PsiReferenceExpression qualifier = null;
      if (arg instanceof PsiMethodReferenceExpression methodRef) {
        if (!BOOLEAN_EQUALS.methodReferenceMatches(methodRef)) return null;
        qualifier = tryCast(methodRef.getQualifierExpression(), PsiReferenceExpression.class);
      }
      else if (arg instanceof PsiLambdaExpression lambda) {
        PsiParameter parameter = ArrayUtil.getFirstElement(lambda.getParameterList().getParameters());
        if (parameter == null) return null;
        PsiMethodCallExpression call = tryCast(LambdaUtil.extractSingleExpressionFromBody(lambda.getBody()), PsiMethodCallExpression.class);
        if (!BOOLEAN_EQUALS.test(call)) return null;
        if (!ExpressionUtils.isReferenceTo(call.getArgumentList().getExpressions()[0], parameter)) return null;
        qualifier = tryCast(call.getMethodExpression().getQualifierExpression(), PsiReferenceExpression.class);
      }
      if (qualifier == null) return null;
      PsiField field = tryCast(qualifier.resolve(), PsiField.class);
      if (field == null) return null;
      PsiClass containingClass = field.getContainingClass();
      if (containingClass != null && JAVA_LANG_BOOLEAN.equals(containingClass.getQualifiedName())) {
        String name = field.getName();
        if ("TRUE".equals(name)) return Boolean.TRUE;
        if ("FALSE".equals(name)) return Boolean.FALSE;
      }
      return null;
    }
@Nullable
    private static Boolean getBooleanEqualsTarget(PsiExpression arg)