import type { SourceType } from '../../../components/PipelineForm/schemas/source';
import type { SourceConfigurationData } from '../../../components/PipelineForm/PipelineForm.types';
/**
 * Reads a single field off the active source's configuration variant.
 *
 * Every source type has its own variant shape — `port` on the relational
 * drivers, `accountIdentifier` on Snowflake, `connectionString` on MongoDB — so
 * the field name is resolved at runtime against the one variant the type
 * actually uses. *Which* fields a summary card shows is decided by
 * `SOURCE_SUMMARY_FIELDS` in `getSourceSummaryRows`; this reader stays
 * deliberately dumb so per-type knowledge lives in exactly one place.
 *
 * Returns `''` for an untyped source, a missing variant, a missing field or a
 * non-string value, so callers can drop empty rows with a single check.
 */
export declare const readVariantField: (configuration: SourceConfigurationData, sourceType: SourceType | "", field: string) => string;