15ccf5eb_TestNG_Command_Line_Parameters_Documentation
[Option] -sourcedir [Argument] A semi-colon separated list of directories. [Documentation] 
The directories where your javadoc annotated test sources are. This option is only necessary if you are using javadoc type annotations. (e.g. "src/test" or "src/test/org/testng/eclipse-plugin;src/test/org/testng/testng").
TestNG
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