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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _sample_variant_file_in_population(x):
 """Check if a sample file is the same as the population file. This is true for batches where we don't extract into samples and do not run decomposition for gemini. '"""

    if "population" in x:
        a = _get_project_vcf(x)
        b = _get_variant_file(x, ("vrn_file",))
        decomposed = tz.get_in(("population", "decomposed"), x)
        if (a and b and not decomposed and len(a) > 0 and len(b) > 0 and
              vcfutils.get_samples(a[0]["path"]) == vcfutils.get_samples(b[0]["path"])):
            return True
    return False