runOutputKey property
String
get
runOutputKey
Output key from where the run method needs to take the return value.
Implementation
String get runOutputKey {
if (outputKeys.length != 1) {
throw LangChainException(
message: '`chain.run` method can only be used with chains that return '
'a single string output. $chainType chain returns '
'${outputKeys.length} output: $outputKeys. '
'Use `chain.call` method instead.',
);
}
return outputKeys.first;
}