lineToSplineHeading   
  Adds a line segment with spline heading interpolation.
Parameters
endPose 
end pose
fun lineToSplineHeading(endPose: Pose2d, velConstraintOverride: TrajectoryVelocityConstraint, accelConstraintOverride: TrajectoryAccelerationConstraint = builder.baseAccelConstraint): TrajectoryCommandBuilder
Adds a line segment with spline heading interpolation.
Parameters
endPose 
end pose
constraintsOverride 
segment-specific constraints