presto-main/src/main/java/io/prestosql/sql/analyzer/ExpressionAnalyzer.java/ExpressionAnalyzer/getFieldToLambdaArgumentDeclaration
class ExpressionAnalyzer:        public Map<FieldId, LambdaArgumentDeclaration> getFieldToLambdaArgumentDeclaration()
        {
            checkState(isInLambda());
            return fieldToLambdaArgumentDeclaration;
        }