field
Creates a reference to a scalar value when the step returns a single value. The type of the value is inferred from the handle's type parameter T.
Parameters
rowIndex
Row index (typically 0).
Creates a reference to a value in a specific column. You must specify the expected type of the value.
Parameters
V
The expected type of the field's value.
columnName
Name of the column to fetch.
rowIndex
Row index (typically 0).