not specified as a
coordinate (x, y, z, m) or an id (e.g., linestring_id, polygon_id) of the input <code>obj</code>.</p>
<p>You can use <code>list_columns</code> to specify which of the properties will be turned into
a list, thus keeping all the values in the column. For columns not specified in <code>list_columns</code>,
only the first row of the column is kept</p>
<p>The <code>sf_*</code> functions assume the input <code>obj</code> is a long data.frame / matrix,
where any properties are repeated down the 