import type { NormalizerData } from '../../normalizer-data';
import type { RArgument } from '../../../../model/nodes/r-argument';
import type { NamedJsonEntry } from '../../../json/format';
/**
 * Either parses `[expr]` or `[SYMBOL_SUB, EQ_SUB, expr]` as an argument of a function call in R.
 * Probably directly called by the function call parser as otherwise, we do not expect to find arguments.
 * @param data - The data used by the parser (see {@link NormalizerData})
 * @param objs - Either `[expr]` or `[SYMBOL_FORMALS, EQ_FORMALS, expr]`
 * @returns The parsed argument or `undefined` if the given object is not an argument.
 */
export declare function tryToNormalizeArgument(data: NormalizerData, objs: readonly NamedJsonEntry[]): RArgument | undefined;