def config_warn(type = :subtrees)
      warn "You shall setup 'Falkorlib.config.git[#{type.to_sym}]' to configure #{type} as follows:"
      warn "     FalkorLib.config.git do |c|"
      warn "       c[#{type.to_sym}] = {"
      warn "          '<subdir>' => {"
      warn "             :url    => '<giturl>',"
      warn "             :branch => 'develop'   # if different from master"
      warn "          },"
      warn "        }"
      warn "     end"
      if type == :submodules
        warn "This will configure the Git submodule into FalkorLib.config.git.submodulesdir"
        warn "i.e. '#{FalkorLib.config.git[:submodulesdir]}'" if FalkorLib.config.git[:submodulesdir]
      end
    end
def config_warn(type = :subtrees)
      warn "You shall setup 'Falkorlib.config.git[#{type.to_sym}]' to configure #{type} as follows:"
      warn "     FalkorLib.config.git do |c|"
      warn "       c[#{type.to_sym}] = {"
      warn "          '<subdir>' => {"
      warn "             :url    => '<giturl>',"
      warn "             :branch => 'develop'   # if different from master"
      warn "          },"
      warn "        }"
      warn "     end"
      if type == :submodules
        warn "This will configure the Git submodule into FalkorLib.config.git.submodulesdir"
        warn "i.e. '#{FalkorLib.config.git[:submodulesdir]}'" if FalkorLib.config.git[:submodulesdir]
      end
    end
Raise a warning message if subtree/submodule section is not present