def p_bigBlock(p):
    '''bigBlock : CURLYL bigBlockIn CURLYR
                | CURLYL CURLYR'''
    if len(p) == 4:
        p[0] = sbml_nodes.blockNode(p[2])
    else:
        p[0] = sbml_nodes.blockNode([])
def p_block(p):
    '''block : CURLYL blockIn CURLYR
            | CURLYL CURLYR'''
    if (len(p) == 3):
        p[0] = sbml_nodes.blockNode([])
    else:
        p[0] = sbml_nodes.blockNode(p[2])
def p_expression_entire(p):
    '''expression : entire'''

    p[0] = sbml_nodes.blockNode(p[1])