Bug 296456 [Import/Export] File -> Import filesystem w/cyclical symbolic folder links causes OOME
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceImportPage1.java
*/
            public void focusLost(FocusEvent e) {
                
                if (entryChanged) {
                    entryChanged = false;
                    updateFromSourceField();
                }
            }
        });
        
        sourceBrowseButton = new Button(sourceContainerGroup, SWT.PUSH);
        sourceBrowseButton.setText(DataTransferMessages.DataTransfer_browse);
        sourceBrowseButton.addListener(SWT.Selection, this);
        sourceBrowseButton.setLayoutData(new GridData(
                GridData.HORIZONTAL_ALIGN_FILL));
        sourceBrowseButton.setFont(parent.getFont());
        setButtonLayoutData(sourceBrowseButton);
    }
    /**
     * Update the receiver from the source name field.
     */
    private void updateFromSourceField() {
        setSourceName(sourceNameField.getText());
        
        updateWidgetEnablements();
    }
    /**
     * Creates and returns a <code>FileSystemElement</code> if the specified
     * file system object merits one.  The criteria for this are:
     * Also create the children.