message: CM: Remove no-longer relevant comment.
diff: @@ -75,7 +75,7 @@ export abstract class VariedTechnique implements Technique {
  protected addShader(builder: ProgramBuilder, flags: TechniqueFlags, gl: WebGLRenderingContext): void { this.addProgram(flags, builder.buildProgram(gl)); }
  protected addProgram(flags: TechniqueFlags, program: ShaderProgram): void {
  const index = this.getShaderIndex(flags);
  - assert(undefined === this._programs[index], "program already exists"); // ###TODO: Why is this assert happening?
  + assert(undefined === this._programs[index], "program already exists");
  this._programs[index] = program;
  }
  