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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package traits
import (
"github.com/google/cel-go/common/types/ref"
)
// FieldTester indicates if a defined field on an object type is set to a
// non-default value.
//
// For use with the `has()` macro.
type FieldTester interface {
// IsSet returns true if the field is defined and set to a non-default
// value. The method will return false if defined and not set, and an error
// if the field is not defined.
IsSet(field ref.Val) ref.Val
}
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