function hasMultipleSignatures( headers ) {
	var name;
	var arr;
	var i;

	arr = RE_ALIAS.exec( headers[ 0 ] );
	name = arr[ 1 ];
	for ( i = 1; i < headers.length; i++ ) {
		arr = RE_ALIAS.exec( headers[ i ] );
		if ( arr[ i ] === name ) {
			return true;
		}
	}
	return false;
}
Checks whether a main export has a variadic interface by scanning the `README.md` header sections.

@private
@param {Array} headers - header array
@returns {boolean} boolean indicating whether there are multiple function signatures in `headers`