Applicable only on auto-layout frames. Determines whether the counter axis has a fixed length (determined by the user) or an automatic length (determined by the layout engine).
counterAxisSizingMode: 'FIXED' | 'AUTO'
Auto-layout frames have a primary axis, which is the axis that resizes when you add new items into the frame. For example, frames with "VERTICAL"
layoutMode resize in the y-axis.
The other axis is called the counter axis.
"FIXED": The counter axis length is determined by the user or plugins, unless the
layoutAlignis set to “STRETCH” or
"AUTO": The counter axis length is determined by the size of the children. If set, the auto-layout frame will automatically resize along the counter axis to fit its children.