/**
 * @defgroup LibCellRenderer LibCellRenderer GObject
 * @ingroup GUI
 *
 * The LibCellRenderer Object is used to render @ref gds_cell and @ref gds_library elements 
 * to a GtkTreeView.
 *
 * The LibCellRenderer class is derived from a GtkCellRendererText and works the same way.
 * The additinal features are three new properties:
 *
 * - *gds-lib*: This property can be used to set a @ref gds_library structure. The renderer will render the name of the library.
 * - *gds-cell*: This property can be used to set a @ref gds_cell structure. The renderer will render the name of the cell.
 * - *error-level*: Set the error level of the cell/library. This affects the foreground color of hte rendered output.
 *
 * Internally the class operates by setting the 'text' property, which is inherited form the base class to the library/cell name (gds_library::name and gds_cell::name fields).
 * The error level (@ref LIB_CELL_RENDERER_ERROR_WARN and @ref LIB_CELL_RENDERER_ERROR_ERR) is translated to the inherited 'foreground-rgba' property.
 *
 */