@Nullable
	public String getPreMappingName(@Nonnull String postMappingName) {
		return mappedClassesReverse.get(postMappingName);
	}
@param postMappingName
		Post-mapping name.

@return Name of the class before the mapping operation.
May be {@code null} if the post-mapping name was not renamed during the mapping operation.
recaf-core/src/main/java/software/coley/recaf/services/mapping/MappingResults.java