Function ncplane_set_bchannel 

pub fn ncplane_set_bchannel(
    plane: &mut NcPlane,
    channel: impl Into<NcChannel_u32>,
) -> NcChannels_u64

Sets the background alpha and coloring bits of an NcPlane from an NcChannel_u32, and returns the new NcChannels_u64.

Method: NcPlane.set_bchannel().