List all the non-primitive glyph ids attached to display.
l_glyph_ids(widget)widget path as a string or as an object handle
Other glyph functions:
l_glyph_add.default(),
l_glyph_add_image(),
l_glyph_add_pointrange(),
l_glyph_add_polygon(),
l_glyph_add_serialaxes(),
l_glyph_add_text(),
l_glyph_add(),
l_glyph_delete(),
l_glyph_getLabel(),
l_glyph_getType(),
l_glyph_relabel(),
l_primitiveGlyphs()