lib/Query/Common/CriterionVisitor/MapLocation.php
protected function getSearchFields(
        Criterion $criterion,
        $fieldDefinitionIdentifier,
        $fieldTypeIdentifier = null,
        $name = null
    ) {
        return $this->fieldNameResolver->getFieldTypes(
            $criterion,
            $fieldDefinitionIdentifier,
            $fieldTypeIdentifier,
            $name
        );
    }
protected function getSearchFields(
        Criterion $criterion,
        $fieldDefinitionIdentifier,
        $fieldTypeIdentifier = null,
        $name = null
    ) {
        return $this->fieldNameResolver->getFieldTypes(
            $criterion,
            $fieldDefinitionIdentifier,
            $fieldTypeIdentifier,
            $name
        );
    }
Get array of search fields.

@param \eZ\Publish\API\Repository\Values\Content\Query\Criterion $criterion
@param string $fieldDefinitionIdentifier
@param string $fieldTypeIdentifier
@param string $name

@return array