tested diagram, e.g. usecase diagram with a11y test tool. Tool bar buttons have
the following a11y issues:
Components with no mnemonic :
   Class: javax.swing.JButton {   |  Diagram Synchronization} 
   Class: javax.swing.JButton {   |  Export as Image} 
   Class: javax.swing.JButton {   |  Fit to Window} 
   Class: javax.swing.JButton {   |  Hierarchical Layout (Ctrl+Shift+H)} 
   Class: javax.swing.JButton {   |  Incremental Layout (Ctrl+Shift+I)} 
   Class: javax.swing.JButton {   |  Move Backward} 
   Class: javax.swing.JButton {   |  Move Forward} 
   Class: javax.swing.JButton {   |  Move to Back} 
   Class: javax.swing.JButton {   |  Move to Front} 
   Class: javax.swing.JButton {   |  Navigate Link} 
   Class: javax.swing.JButton {   |  Orthogonal Layout (Ctrl+Shift+R)} 
   Class: javax.swing.JButton {   |  Overview Window (F8)} 
   Class: javax.swing.JButton {   |  Pan} 
   Class: javax.swing.JButton {   |  Print Preview the active diagram} 
   Class: javax.swing.JButton {   |  Relationship Discovery} 
   Class: javax.swing.JButton {   |  Select} 
   Class: javax.swing.JButton {   |  Symmetric Layout (Ctrl+Shift+Y)} 
   Class: javax.swing.JButton {   |  Zoom In} 
   Class: javax.swing.JButton {   |  Zoom Interactively} 
   Class: javax.swing.JButton {   |  Zoom Out} 
   Class: javax.swing.JButton {   |  Zoom with Marquee} 
Components not reachable with tab traversal :
   Class: javax.swing.JButton {   |  Diagram Synchronization} 
   Class: javax.swing.JButton {   |  Export as Image} 
   Class: javax.swing.JButton {   |  Fit to Window} 
   Class: javax.swing.JButton {   |  Hierarchical Layout (Ctrl+Shift+H)} 
   Class: javax.swing.JButton {   |  Incremental Layout (Ctrl+Shift+I)} 
   Class: javax.swing.JButton {   |  Move Backward} 
   Class: javax.swing.JButton {   |  Move Forward} 
   Class: javax.swing.JButton {   |  Move to Back} 
   Class: javax.swing.JButton {   |  Move to Front} 
   Class: javax.swing.JButton {   |  Navigate Link} 
   Class: javax.swing.JButton {   |  Orthogonal Layout (Ctrl+Shift+R)} 
   Class: javax.swing.JButton {   |  Overview Window (F8)} 
   Class: javax.swing.JButton {   |  Pan} 
   Class: javax.swing.JButton {   |  Print Preview the active diagram} 
   Class: javax.swing.JButton {   |  Relationship Discovery} 
   Class: javax.swing.JButton {   |  Select} 
   Class: javax.swing.JButton {   |  Symmetric Layout (Ctrl+Shift+Y)} 
   Class: javax.swing.JButton {   |  Zoom In} 
   Class: javax.swing.JButton {   |  Zoom Interactively} 
   Class: javax.swing.JButton {   |  Zoom Out} 
   Class: javax.swing.JButton {   |  Zoom with Marquee} 
   Class: javax.swing.plaf.basic.BasicComboBoxEditor$BorderlessTextField {  |  } 
   Class: org.netbeans.modules.uml.ui.swing.drawingarea.ADDrawingAreaControl {  |  }