Capture expected warnings logged when modify_ call fails. (#4204)
Capture expected warnings logged when modify_ call fails. (#4204)


rachel-fenichel/blockly,mark-friedman/blockly,mark-friedman/blockly,google/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,mark-friedman/blockly,google/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,rachel-fenichel/blockly,mark-friedman/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,google/blockly,google/blockly,mark-friedman/blockly,mark-friedman/blockly