/**
 * Creates an `apply` function for a filter operator field.
 *
 * This is the core execution logic: given a PgCondition ($where) and an input value,
 * it resolves the SQL identifier, SQL value, and calls the operator's resolve function
 * to produce a SQL WHERE clause fragment, then applies it via `$where.where(fragment)`.
 *
 * The `pgFilterAttribute` extension on $where provides the context about which
 * column is being filtered, including the attribute name, codec, and any expression.
 */
export declare function makeApplyFromOperatorSpec(build: any, _typeName: string, fieldName: string, spec: any, _type: any): any;