Excluding parts of source code during compilation

[suraj puvvada]

Hi,

Is there a way to exclude parts of code during compilation ? For example I
would like exclude a bunch of DEBUG/NON_PRODUCT code for production builds.

NOT_PRODUCT_BLOCK
{
  //some statements
}

or

if(DEBUG || NOT_PRODUCT)
{
   //bunch of statements
}

Thanks
Suraj
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