Quick Fixes
The quick fixes can be accesses by clicking on an error marker 
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This opens a popup menu, which provides several fixes, as shown in the screenshot.
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The quick fixes, proposed by Euklas, use three different icons:
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for quick fixes that are related to functions and variables
for quick fixes related to imports 
for ignoring certain errors (additional information can be found in the
section on Selecting a quick fix of the first category will copy additional code from the source file into your code to fix the error. Selecting a quick fix of the second category will show you how to fix this kind of errors manually. Selecting a ‘quick fix’ of the third category will ignore the error, but not fix it.
