Function field

datafusion/common/src/nested_struct.rs:529–531

(name: &str, data_type: DataType)

    }

    fn field(name: &str, data_type: DataType) -> Field {
        Field::new(name, data_type, true)
    }

    fn non_null_field(name: &str, data_type: DataType) -> Field {
        Field::new(name, data_type, false)