RenameColumnsWithNameVAF: Is there any column in df1 with name "VAF"?
If there is, change its name to "VAF_old" so that it will
conflict with code in other parts of ICAMS package.
Description
Is there any column in df1 with name "VAF"?
If there is, change its name to "VAF_old" so that it will
conflict with code in other parts of ICAMS package.
Usage
RenameColumnsWithNameVAF(df)