| apply_types | Convert column-type according to column_name |
| build_filter | Build filter from tribble |
| build_query | Build the query |
| get_column_type | Convert column-type according to column_name |
| get_login_token | Fetch login token |
| get_test_credentials | get_test_credentials getting credentials for testing |
| is_column_a_metric | is_column_a_metric Checks if column_name indicates numeric values Uses https://developers.piwik.pro/en/latest/custom_reports/columns.html |
| MAX_LINES_PER_REQUEST | Maximum number of line requested |
| release_questions | Ask package specific question during release-process |
| send_query | Send the query and receive the result |
| send_query_single | Send the query and receive the result |