Vision/src/V1/FaceAnnotation.php
public function setUnderExposedLikelihood($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Vision\V1\Likelihood::class);
        $this->under_exposed_likelihood = $var;

        return $this;
    }
public function setUnderExposedLikelihood($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Vision\V1\Likelihood::class);
        $this->under_exposed_likelihood = $var;

        return $this;
    }
public function setUnderExposedLikelihood ( $ var ) { GPBUtil :: checkEnum ( $ var , \ Google \ Cloud \ Vision \ V1 \ Likelihood :: class ) ; $ this -> under_exposed_likelihood = $ var ; return $ this ; }
Under-exposed likelihood.

Generated from protobuf field <code>.google.cloud.vision.v1.Likelihood under_exposed_likelihood = 13;</code>
@param int $var
@return $this
Under - exposed likelihood .