ResponsiveImageStyle::setBreakpointGroup

public ResponsiveImageStyle::setBreakpointGroup($breakpoint_group)

public function setBreakpointGroup($breakpoint_group) {
  // If the breakpoint group is changed then the image style mappings are
  // invalid.
  if ($breakpoint_group !== $this->breakpoint_group) {
    $this->removeImageStyleMappings();
  }
  $this->breakpoint_group = $breakpoint_group;
  return $this;
}