Make getEventWorkspace_ protected.
Make getEventWorkspace_ protected.

Fixes 12 warnings
nickmain/blockly,trinketapp/blockly,picklesrus/blockly,mark-friedman/blockly,rachel-fenichel/blockly,google/blockly,twodee/blockly,trinketapp/blockly,mark-friedman/blockly,twodee/blockly,rachel-fenichel/blockly,nickmain/blockly,twodee/blockly,google/blockly,joshlory/blockly,rachel-fenichel/blockly,google/blockly,twodee/blockly,jstnhuang/blockly,nickmain/blockly,trinketapp/blockly,rachel-fenichel/blockly,google/blockly,twodee/blockly,google/blockly,trinketapp/blockly,jstnhuang/blockly,joshlory/blockly,mark-friedman/blockly,jstnhuang/blockly,mark-friedman/blockly,mark-friedman/blockly,rachel-fenichel/blockly,joshlory/blockly,picklesrus/blockly,mark-friedman/blockly,nickmain/blockly,google/blockly,twodee/blockly,rachel-fenichel/blockly,jstnhuang/blockly,nickmain/blockly,google/blockly,picklesrus/blockly,nickmain/blockly,rachel-fenichel/blockly