{
    "subjects": [
        "one",
        "two"
    ],
    "iterations": [
        10,
        20,
        10,
        30
    ]
}
---
{
    "aggregate": [
        "not-existing"
    ]
}
---
Cannot aggregate: field "not-existing" does not exist, know fields: "has_baseline", "benchmark_name", "benchmark_class", "subject_name", "subject_groups", "subject_time_unit", "subject_time_precision", "subject_time_mode", "variant_name", "variant_params", "variant_revs", "variant_iterations", "suite_tag", "suite_date", "suite_time", "iteration_index", "result_time_net", "result_time_revs", "result_time_avg", "result_mem_peak", "result_mem_real", "result_mem_final", "result_reject_count", "result_comp_z_value", "result_comp_deviation"