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Returns whether the specified file object can be written to. #### Syntax canWrite( file ) file.canWrite( ) #### Parameters
file | the file object being checked.
#### Returns
boolean | true if file can be written to. false if file can not be written to.
#### Example
    fh = File( storage )
    if !fh.canWrite( ) then
        println( "unable to write to storage" )
        exit( -1 )
    end
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