code: def get_indexes_of_long_examples(df, max_total_char_length):
      long_examples = df.apply(
          lambda x: len(x.prompt) + len(x.completion)
          > max_total_char_length,
          axis=1,
      )
      return df.reset_index().index[long_examples].tolist()
  
imports: import pandas
  import pytest
  from ..customization_dataset_preparation import convert_into_prompt_completion_only, convert_into_template, drop_duplicated_rows, drop_unrequired_fields, get_common_suffix, get_prepared_filename, parse_template, recommend_hyperparameters, show_first_example_in_df, split_into_train_validation, template_mapper, validate_template, warn_and_drop_long_samples, warn_completion_is_not_empty, warn_duplicated_rows, warn_imbalanced_completion, warn_low_n_samples, warn_missing_suffix
label_desc: Use image node_id 14 for calling a global function with example usage: get_indexes_of_long_examples(df, max_total_char_length) and returns: df