return true if a label is valid . this checks only the given label in isolation . it does not check whether the given label is used by any existing perspectives . concode_field_sep IExtensionRegistry extensionRegistry concode_elem_sep EModelService modelService concode_elem_sep MApplication application concode_elem_sep Map<String,PerspectiveDescriptor> descriptors concode_elem_sep Logger logger concode_elem_sep IEclipseContext context concode_elem_sep IEclipseContext impExpHandlerContext concode_field_sep IPerspectiveDescriptor findPerspectiveWithId concode_elem_sep IPerspectiveDescriptor findPerspectiveWithId concode_elem_sep String getDefaultPerspective concode_elem_sep void setDefaultPerspective concode_elem_sep String createNewId concode_elem_sep IPerspectiveDescriptor findPerspectiveWithLabel concode_elem_sep void removeExtension concode_elem_sep void revertPerspective concode_elem_sep PerspectiveDescriptor createPerspective concode_elem_sep MUIElement removeSnippet concode_elem_sep IPerspectiveDescriptor clonePerspective concode_elem_sep void deletePerspective concode_elem_sep void addPerspective concode_elem_sep IPerspectiveDescriptor[] getPerspectives concode_elem_sep void dispose concode_elem_sep void addExtension concode_elem_sep String getOriginalId concode_elem_sep void deletePerspectives concode_elem_sep void postConstruct concode_elem_sep void createDescriptor
boolean function ( String arg0 ) { arg0 = arg0 . trim ( ) ; if ( arg0 . length ( ) <= 0 ) { return false ; } return true ; }