```ruby
class BuildMarkersWithInfoWindow

  def self.with(volops, listener, marker_builder = Gmaps4rails, helper = ActionController::Base.helpers)
    new(volops, listener, marker_builder, helper).send(:run)
  end

  private

  attr_reader :volops, :listener, :marker_builder, :helper

  def initialize(volops, listener, marker_builder, helper)
    @volops = volops
    @listener = listener
    @marker_builder = marker_builder
    @helper = helper
  end

  def run
    method(:build_single_marker)
    marker_builder.build_markers(volops, &method(:build_single_marker)).to_json
  end

  def build_single_marker(volop, marker)
    marker.lat volop.latitude.nil? ? volop.organisation.latitude : volop.latitude
    marker.lng volop.longitude.nil? ? volop.organisation.longitude : volop.longitude
    marker.infowindow listener.render_to_string(partial: "popup_#{volop.source}", locals: {volop: volop})
    marker.json(
      custom_marker: listener.render_to_string(
        partial: 'shared/custom_marker',
        locals: {attrs: [helper.asset_path("volunteer_icon_#{volop.source}.png"),
                         'data-id' => volop.id,
                         class: 'vol_op',
                         title: "Click here to see volunteer opportunities at #{volop.title}"]}
      ),
      index: 1,
      type: 'vol_op'
    )
  end

end```

Adjust tooltip to use organisation name
user
```ruby
class BuildMarkersWithInfoWindow

  def self.with(volops, listener, marker_builder = Gmaps4rails, helper = ActionController::Base.helpers)
    new(volops, listener, marker_builder, helper).send(:run)
  end

  private

  attr_reader :volops, :listener, :marker_builder, :helper

  def initialize(volops, listener, marker_builder, helper)
    @volops = volops
    @listener = listener
    @marker_builder = marker_builder
    @helper = helper
  end

  def run
    method(:build_single_marker)
    marker_builder.build_markers(volops, &method(:build_single_marker)).to_json
  end

  def build_single_marker(volop, marker)
    marker.lat volop.latitude.nil? ? volop.organisation.latitude : volop.latitude
    marker.lng volop.longitude.nil? ? volop.organisation.longitude : volop.longitude
    marker.infowindow listener.render_to_string(partial: "popup_#{volop.source}", locals: {volop: volop})
    marker.json(
      custom_marker: listener.render_to_string(
        partial: 'shared/custom_marker',
        locals: {attrs: [helper.asset_path("volunteer_icon_#{volop.source}.png"),
                         'data-id' => volop.id,
                         class: 'vol_op',
                         title: "Click here to see volunteer opportunities at #{volop.organisation_name}"]}
      ),
      index: 1,
      type: 'vol_op'
    )
  end

end```
assistant