Print a short version of elements in master and base objects
Usage
# S3 method for master_matrix
print(x, ...)
# S3 method for master_selection
print(x, ...)
# S3 method for base_PAM
print(x, ...)
# S3 method for PAM_subset
print(x, ...)
# S3 method for PAM_CS
print(x, ...)