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package com.wavefront.predicates;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

/**
 * An expression that returns a string.
 *
 * @author [email protected].
 */
public interface StringExpression extends BaseExpression {

  /**
   * Get a string value.
   *
   * @param entity entity to get the value from.
   * @return string value
   */
  @Nonnull
  String getString(@Nullable Object entity);
}