public boolean isInternal() {
        return internal;
    }
Constructs a new composite property from the given primary and array of secondary properties.
<p>
Note that name of the composite property is taken from its primary property,
and primary and secondary properties must not be composite properties themselves.

@param primaryProperty
@param secondaryExtractProperties
@return the composite property
tika-core/src/main/java/org/apache/tika/metadata/Property.java