# Returns array of parent relationships for which this resource is child and is loaded
#
# @return [Array<DataMapper::Associations::ManyToOne::Relationship>]
#   array of child relationships for which this resource is parent and is loaded
#
# @api private
def parent_associations
  parent_associations = []

  relationships.each_value do |r|
    if r.kind_of?(Associations::ManyToOne::Relationship) && r.loaded?(self) && association = r.get!(self)
      parent_associations << association
    end
  end

  parent_associations.freeze
end