docstr: Sample two random points, x and x' from mutual random orthogonal 
  transformations of (1,0) and (cos(theta), sin(theta)), where theta
  is the angle between x and xdash.
  
  Args:
      theta (float): Angle required between x and xdash
  Returns:
      x (np.array(float)): first point of size (self.layer_widths[0], 1)
      xdash (np.array(float)): second point (self.layer_widths[0], 1)
code: def _sample_x_xdash(self, theta):
      """
      Sample two random points, x and x' from mutual random orthogonal
      transformations of (1,0) and (cos(theta), sin(theta)), where theta
      is the angle between x and xdash.
  
      Args:
          theta (float): Angle required between x and xdash
      Returns:
          x (np.array(float)): first point of size (self.layer_widths[0], 1)
          xdash (np.array(float)): second point (self.layer_widths[0], 1)
      """
      u = np.asarray([[1], [0]])
      v = np.asarray([[np.cos(theta)], [np.sin(theta)]])
  
      A = np.random.uniform(size=(self.layer_widths[0], 2))
      q, _ = np.linalg.qr(A)
  
      x = np.transpose(np.matmul(q, u))
      xdash = np.transpose(np.matmul(q, v))
  
      return x, xdash
  
file_path: elu-gelu-kernels/code/networks/np_mlp.py
imports: import numpy
  from .np_initialisers import create_initialiser
label_desc: Use image node_id 6 for calling the Mlp obj's underlying member method code with example usage: obj._sample_x_xdash(theta) and returns: x,  xdash