getAttribLocation method
Implementation
UniformLocation getAttribLocation(Program program, String name) {
  startCheck("getAttribLocation");
  return UniformLocation(glGetAttribLocation(_gl, program.id, name));
}
UniformLocation getAttribLocation(Program program, String name) {
  startCheck("getAttribLocation");
  return UniformLocation(glGetAttribLocation(_gl, program.id, name));
}