/// <summary>
/// Prepends the specified matrix with this matrix.
/// </summary>
/// <param name="matrix"></param>
public void prependMatrix(Matrix2D matrix) { }
/// <summary>
/// Returns a matrix based on this object's transform.
/// </summary>
/// <param name="matrix">Optional. A Matrix2D object to populate with the calculated values. If null, a new Matrix object is returned.</param>
/// <returns>A matrix representing this display object's transform.</returns>
public Matrix2D getMatrix(Matrix2D matrix) { return null; }
/// <summary>
/// Appends the specified matrix with this matrix.
/// </summary>
/// <param name="matrix"></param>
/// <returns>This matrix. Useful for chaining method calls.</returns>
public Matrix2D appendMatrix(Matrix2D matrix) { return null; }
/// <summary>
/// Generates a concatenated Matrix2D object representing the combined transform of the display object and all of its parent Containers up to the highest level ancestor (usually the stage).
/// This can be used to transform positions between coordinate spaces, such as with localToGlobal and globalToLocal.
/// </summary>
/// <param name="mtx">Optional. A Matrix2D object to populate with the calculated values. If null, a new Matrix object is returned.</param>
/// <returns>a concatenated Matrix2D object representing the combined transform of the display object and all of its parent Containers up to the highest level ancestor (usually the stage).</returns>
public Matrix2D getConcatenatedMatrix(Matrix2D mtx) { return null; }