processing.app.debug.RunnerException: The function resolutions() does not exist.
    at processing.app.Sketch.placeException(Sketch.java:1543)
    at processing.app.debug.Compiler.compile(Compiler.java:149)
    at processing.app.Sketch.build(Sketch.java:1573)
    at processing.app.Sketch.build(Sketch.java:1553)
    at processing.app.Editor$DefaultRunHandler.run(Editor.java:1485)
    at java.lang.Thread.run(Thread.java:636)

Using the example script getting started capture linux:
int[][] res = cam.resolutions();

also tried
int[][] res = GSCapture.resolutions();

int[][] res = new GSCapture.resolutions(this);

gives this error as does any other method called GSCapture except available.
Are these methods not available in linux?

/**
 * Getting Started with Capture.
 *
 * GSVideo version by Andres Colubri.
 *
 * Reading and displaying an image from an attached Capture device.
 */
import codeanticode.gsvideo.*;
import codeanticode.gsvideo.GSCapture;


GSCapture cam;

void setup() {
  size(640, 480);
  // size(1024, 768);

  /*
  However, different cameras can be selected by using their device file:
  cam = new GSCapture(this, 640, 480, "/dev/video0");
  cam = new GSCapture(this, 640, 480, "/dev/video1");
  etc.
  */
  cam = new GSCapture(this, 640, 480);
  int[][] res = cam.resolutions();
}

void draw() {
  if (cam.available() == true) {
    cam.read();
    image(cam, 0, 0);
    // The following does the same, and is faster when just drawing the image
    // without any additional resizing, transformations, or tint.
    //set(160, 100, cam);
  }
}