When set to true, the names of new columns are prepended with the name of the source column. Example:
| Source Column | Output Column |
|---|---|
mySourceColumn | mySourceColumn_column1 |
Nested key references are appended to the column name:
| Source Column | Key Value | Output Column |
|---|---|---|
mySourceColumn | keys: '[Key1][Key2]' | mySourceColumn_Key1_Key2 |
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