def _validate_dependencies_met():
<EOL>from cryptography.x509.extensions import Extensions<EOL>if getattr(Extensions, "<STR_LIT>", None) is None:<EOL><INDENT>raise ImportError("<STR_LIT>"<EOL>"<STR_LIT>")<EOL><DEDENT>from OpenSSL.crypto import X509<EOL>x509 = X509()<EOL>if getattr(x509, "<STR_LIT>", None) is None:<EOL><INDENT>raise ImportError("<STR_LIT>"<EOL>"<STR_LIT>")<EOL><DEDENT>
Verifies that PyOpenSSL's package-level dependencies have been met.
Throws `ImportError` if they are not met.